/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/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:29:24,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:29:24,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:29:24,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:29:24,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:29:24,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:29:24,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:29:24,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:29:24,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:29:24,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:29:24,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:29:24,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:29:24,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:29:24,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:29:24,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:29:24,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:29:24,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:29:24,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:29:24,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:29:24,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:29:24,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:29:24,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:29:24,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:29:24,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:29:24,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:29:24,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:29:24,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:29:24,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:29:24,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:29:24,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:29:24,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:29:24,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:29:24,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:29:24,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:29:24,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:29:24,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:29:24,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:29:24,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:29:24,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:29:24,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:29:24,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:29:24,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:29:25,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:29:25,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:29:25,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:29:25,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:29:25,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:29:25,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:29:25,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:29:25,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:29:25,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:29:25,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:29:25,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:29:25,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:29:25,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:29:25,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:29:25,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:29:25,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:29:25,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:29:25,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:29:25,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:29:25,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:29:25,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:29:25,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:29:25,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:29:25,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:29:25,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:29:25,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:29:25,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:29:25,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:29:25,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:29:25,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:29:25,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:29:25,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:29:25,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:29:25,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:29:25,356 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:29:25,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 21:29:25,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f2bbf7f/285264c3e96f42c5a305a89e42e35ea3/FLAG6829acc5c [2020-10-21 21:29:25,979 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:29:25,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 21:29:26,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f2bbf7f/285264c3e96f42c5a305a89e42e35ea3/FLAG6829acc5c [2020-10-21 21:29:26,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f2bbf7f/285264c3e96f42c5a305a89e42e35ea3 [2020-10-21 21:29:26,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:29:26,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:29:26,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:26,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:29:26,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:29:26,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad520e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26, skipping insertion in model container [2020-10-21 21:29:26,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:29:26,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:29:26,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:26,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:29:26,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:27,062 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:29:27,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27 WrapperNode [2020-10-21 21:29:27,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:27,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:27,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:29:27,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:29:27,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:27,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:29:27,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:29:27,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:29:27,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:29:27,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:29:27,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:29:27,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:29:27,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:29:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:29:27,213 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:29:27,213 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:29:27,213 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:29:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:29:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:29:27,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:29:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:29:27,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:29:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:29:27,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:29:27,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:29:27,218 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:29:27,570 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:29:27,571 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:29:27,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27 BoogieIcfgContainer [2020-10-21 21:29:27,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:29:27,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:29:27,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:29:27,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:29:27,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:29:26" (1/3) ... [2020-10-21 21:29:27,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce78a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (2/3) ... [2020-10-21 21:29:27,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ce78a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27" (3/3) ... [2020-10-21 21:29:27,591 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-21 21:29:27,602 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:29:27,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:29:27,609 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:29:27,610 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:29:27,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,644 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,644 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,645 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,649 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,649 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,654 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,654 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,671 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,671 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,671 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,674 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:29:27,685 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:29:27,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:29:27,705 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:29:27,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:29:27,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:29:27,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:29:27,705 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:29:27,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:29:27,705 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:29:27,718 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:29:27,721 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,723 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,725 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,767 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 21:29:27,767 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:29:27,773 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 21:29:27,776 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 21:29:29,025 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-21 21:29:29,470 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 21:29:29,604 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 21:29:29,672 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-10-21 21:29:29,673 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-21 21:29:29,681 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:29:29,696 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:29:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:29:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:29:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:29,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:29:29,708 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-10-21 21:29:29,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:29,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667162169] [2020-10-21 21:29:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:29,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667162169] [2020-10-21 21:29:29,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:29:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955268262] [2020-10-21 21:29:29,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:29:29,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:29:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:29:29,992 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:29:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,062 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 21:29:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:29:30,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:29:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,077 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:30,077 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:29:30,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:29:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 21:29:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 21:29:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 21:29:30,122 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 21:29:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,122 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 21:29:30,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:29:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 21:29:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:30,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:29:30,124 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-10-21 21:29:30,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110775876] [2020-10-21 21:29:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110775876] [2020-10-21 21:29:30,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933835241] [2020-10-21 21:29:30,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,250 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 21:29:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,307 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 21:29:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,310 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:29:30,310 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:29:30,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:29:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 21:29:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:29:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 21:29:30,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 21:29:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,323 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 21:29:30,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 21:29:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:29:30,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-10-21 21:29:30,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525669962] [2020-10-21 21:29:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525669962] [2020-10-21 21:29:30,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:30,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662334250] [2020-10-21 21:29:30,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,392 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 21:29:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,472 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 21:29:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,474 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:30,474 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 21:29:30,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 21:29:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 21:29:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 21:29:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 21:29:30,485 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 21:29:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,485 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 21:29:30,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 21:29:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:30,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,487 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:29:30,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-10-21 21:29:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881392324] [2020-10-21 21:29:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881392324] [2020-10-21 21:29:30,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910654658] [2020-10-21 21:29:30,562 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:30,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:30,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 21:29:30,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401305504] [2020-10-21 21:29:30,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:29:30,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:29:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:29:30,727 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 21:29:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,808 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 21:29:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:30,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 21:29:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,810 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:29:30,810 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 21:29:30,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 21:29:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 21:29:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 21:29:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 21:29:30,821 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 21:29:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,821 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 21:29:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:29:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 21:29:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,823 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-10-21 21:29:31,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651909774] [2020-10-21 21:29:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651909774] [2020-10-21 21:29:31,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599875449] [2020-10-21 21:29:31,137 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:31,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:31,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 21:29:31,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878937906] [2020-10-21 21:29:31,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:29:31,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:29:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,257 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 21:29:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,370 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 21:29:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 21:29:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,374 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:29:31,374 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 21:29:31,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 21:29:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 21:29:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:29:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 21:29:31,393 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 21:29:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,393 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 21:29:31,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:29:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 21:29:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,614 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-10-21 21:29:31,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239269613] [2020-10-21 21:29:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239269613] [2020-10-21 21:29:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130930007] [2020-10-21 21:29:31,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:31,707 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 21:29:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,785 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,788 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:31,788 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:31,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 21:29:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 21:29:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 21:29:31,805 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 21:29:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,805 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 21:29:31,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 21:29:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 21:29:31,808 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-10-21 21:29:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434954948] [2020-10-21 21:29:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434954948] [2020-10-21 21:29:31,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:31,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029636108] [2020-10-21 21:29:31,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:31,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:31,907 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 21:29:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,000 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:32,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,001 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:32,002 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:32,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 21:29:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 21:29:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 21:29:32,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 21:29:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,010 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 21:29:32,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 21:29:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:32,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,012 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:32,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 21:29:32,012 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-10-21 21:29:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:32,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388025917] [2020-10-21 21:29:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388025917] [2020-10-21 21:29:32,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293792875] [2020-10-21 21:29:32,095 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:32,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 21:29:32,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575929235] [2020-10-21 21:29:32,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:29:32,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:29:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:32,269 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 21:29:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,370 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 21:29:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 21:29:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,372 INFO L225 Difference]: With dead ends: 122 [2020-10-21 21:29:32,372 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 21:29:32,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:29:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 21:29:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 21:29:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 21:29:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 21:29:32,380 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 21:29:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,380 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 21:29:32,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:29:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 21:29:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,382 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:32,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,597 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-10-21 21:29:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:32,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513071099] [2020-10-21 21:29:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513071099] [2020-10-21 21:29:32,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664067092] [2020-10-21 21:29:32,661 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:32,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285286895] [2020-10-21 21:29:32,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:32,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:32,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:32,816 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 21:29:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,953 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 21:29:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 21:29:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,955 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:32,955 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 21:29:32,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:29:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 21:29:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 21:29:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:32,963 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 21:29:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,963 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:32,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:32,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,965 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,179 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-10-21 21:29:33,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311405471] [2020-10-21 21:29:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311405471] [2020-10-21 21:29:33,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062581586] [2020-10-21 21:29:33,246 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:33,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:33,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:33,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172662798] [2020-10-21 21:29:33,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:33,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:33,407 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:33,614 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 21:29:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:33,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:33,616 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:33,616 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 21:29:33,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 21:29:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 21:29:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:33,622 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 21:29:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:33,622 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:33,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:33,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:33,623 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:29:33,824 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-10-21 21:29:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384206923] [2020-10-21 21:29:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384206923] [2020-10-21 21:29:33,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611856575] [2020-10-21 21:29:33,900 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:34,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:34,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:34,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562118087] [2020-10-21 21:29:34,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:34,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:34,014 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,261 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 21:29:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:34,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,265 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:34,265 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:34,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 21:29:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 21:29:34,271 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 21:29:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,271 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 21:29:34,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 21:29:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,272 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:34,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:34,484 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-10-21 21:29:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:34,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583194110] [2020-10-21 21:29:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583194110] [2020-10-21 21:29:34,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77791449] [2020-10-21 21:29:34,551 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:34,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:34,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:34,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338917675] [2020-10-21 21:29:34,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:34,667 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 21:29:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,800 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 21:29:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:34,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,802 INFO L225 Difference]: With dead ends: 126 [2020-10-21 21:29:34,802 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 21:29:34,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 21:29:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 21:29:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 21:29:34,807 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 21:29:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 21:29:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 21:29:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,808 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:35,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:35,020 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-10-21 21:29:35,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:35,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382610827] [2020-10-21 21:29:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382610827] [2020-10-21 21:29:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77846031] [2020-10-21 21:29:35,100 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:35,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:29:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299079271] [2020-10-21 21:29:35,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,235 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 21:29:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:35,392 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 21:29:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:35,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:35,393 INFO L225 Difference]: With dead ends: 127 [2020-10-21 21:29:35,394 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:29:35,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:29:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 21:29:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:29:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 21:29:35,398 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 21:29:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 21:29:35,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 21:29:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:35,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:35,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:35,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:29:35,612 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-10-21 21:29:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:35,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694083414] [2020-10-21 21:29:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694083414] [2020-10-21 21:29:35,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769667919] [2020-10-21 21:29:35,670 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023331147] [2020-10-21 21:29:35,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,816 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 21:29:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:36,020 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 21:29:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:36,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:36,024 INFO L225 Difference]: With dead ends: 141 [2020-10-21 21:29:36,025 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 21:29:36,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 21:29:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 21:29:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 21:29:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 21:29:36,030 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 21:29:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:36,030 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 21:29:36,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 21:29:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:36,031 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:36,241 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-10-21 21:29:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426420576] [2020-10-21 21:29:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426420576] [2020-10-21 21:29:36,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540947299] [2020-10-21 21:29:36,302 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:36,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:36,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:36,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:36,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:36,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:36,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603390308] [2020-10-21 21:29:36,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:36,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:36,484 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 11 states. [2020-10-21 21:29:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:36,692 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 21:29:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:36,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:36,695 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:36,695 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:36,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 21:29:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 21:29:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 21:29:36,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 21:29:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:36,701 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 21:29:36,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 21:29:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:36,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:36,702 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:29:36,907 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-10-21 21:29:36,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60617374] [2020-10-21 21:29:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60617374] [2020-10-21 21:29:36,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193979196] [2020-10-21 21:29:36,981 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:37,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:37,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:37,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:37,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:37,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418182759] [2020-10-21 21:29:37,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:29:37,149 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 21:29:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,278 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 21:29:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 21:29:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,280 INFO L225 Difference]: With dead ends: 143 [2020-10-21 21:29:37,280 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:29:37,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:29:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:29:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 21:29:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 21:29:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 21:29:37,285 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 21:29:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,285 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 21:29:37,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:29:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 21:29:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,286 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:37,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:29:37,499 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-10-21 21:29:37,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:37,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535687286] [2020-10-21 21:29:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535687286] [2020-10-21 21:29:37,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599511567] [2020-10-21 21:29:37,569 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:37,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:37,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:37,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:37,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029437789] [2020-10-21 21:29:37,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:37,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:37,703 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 21:29:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,861 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 21:29:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 21:29:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,862 INFO L225 Difference]: With dead ends: 147 [2020-10-21 21:29:37,863 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 21:29:37,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:29:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 21:29:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 21:29:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 21:29:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 21:29:37,867 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 21:29:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 21:29:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 21:29:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:37,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,869 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:38,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:29:38,077 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-10-21 21:29:38,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:38,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800956866] [2020-10-21 21:29:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800956866] [2020-10-21 21:29:38,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979410626] [2020-10-21 21:29:38,155 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:38,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:38,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:38,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:38,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:38,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735323764] [2020-10-21 21:29:38,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:38,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:38,320 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 21:29:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:38,606 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 21:29:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:38,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:29:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:38,609 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:29:38,609 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 21:29:38,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:29:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 21:29:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 21:29:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:29:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 21:29:38,614 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 21:29:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:38,615 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 21:29:38,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 21:29:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:38,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:38,616 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:38,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:29:38,827 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-10-21 21:29:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:38,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715313358] [2020-10-21 21:29:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715313358] [2020-10-21 21:29:38,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657966056] [2020-10-21 21:29:38,911 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:38,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:39,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:43,261 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 21:29:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:43,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:43,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:43,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506967557] [2020-10-21 21:29:43,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:43,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:43,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:43,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 21:29:43,264 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 21:29:45,462 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-10-21 21:29:49,749 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-21 21:29:59,132 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 21:30:07,827 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 21:30:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:13,973 INFO L93 Difference]: Finished difference Result 171 states and 404 transitions. [2020-10-21 21:30:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:13,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 21:30:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:13,976 INFO L225 Difference]: With dead ends: 171 [2020-10-21 21:30:13,976 INFO L226 Difference]: Without dead ends: 166 [2020-10-21 21:30:13,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=207, Invalid=440, Unknown=3, NotChecked=0, Total=650 [2020-10-21 21:30:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-21 21:30:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2020-10-21 21:30:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 21:30:13,981 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 21:30:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:13,981 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 21:30:13,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:30:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 21:30:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:13,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:13,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:14,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:14,183 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-10-21 21:30:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:14,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248782418] [2020-10-21 21:30:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248782418] [2020-10-21 21:30:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770883480] [2020-10-21 21:30:14,267 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:14,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:14,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605411725] [2020-10-21 21:30:14,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:14,402 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 21:30:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:14,667 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 21:30:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:14,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:14,669 INFO L225 Difference]: With dead ends: 148 [2020-10-21 21:30:14,669 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 21:30:14,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 21:30:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 21:30:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 21:30:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 21:30:14,691 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 21:30:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:14,692 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 21:30:14,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 21:30:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:14,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:14,696 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:14,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:14,909 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-10-21 21:30:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:14,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873018866] [2020-10-21 21:30:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873018866] [2020-10-21 21:30:14,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321953058] [2020-10-21 21:30:14,999 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:15,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:15,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:15,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:15,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085847508] [2020-10-21 21:30:15,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:15,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:15,187 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 21:30:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:15,507 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 21:30:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:15,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:15,510 INFO L225 Difference]: With dead ends: 167 [2020-10-21 21:30:15,510 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 21:30:15,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 21:30:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 21:30:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 21:30:15,515 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 21:30:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:15,515 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 21:30:15,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 21:30:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:15,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:15,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:15,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:15,729 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-10-21 21:30:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:15,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767442329] [2020-10-21 21:30:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767442329] [2020-10-21 21:30:15,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674181590] [2020-10-21 21:30:15,800 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:15,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657012005] [2020-10-21 21:30:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:15,927 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 21:30:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:16,316 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 21:30:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:16,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:16,317 INFO L225 Difference]: With dead ends: 177 [2020-10-21 21:30:16,318 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 21:30:16,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 21:30:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 21:30:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 21:30:16,328 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 21:30:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:16,329 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 21:30:16,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 21:30:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:16,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:16,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:16,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:30:16,542 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-10-21 21:30:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:16,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65902699] [2020-10-21 21:30:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:16,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65902699] [2020-10-21 21:30:16,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633079672] [2020-10-21 21:30:16,624 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:16,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:16,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:16,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:16,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989744146] [2020-10-21 21:30:16,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:16,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:16,813 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:17,157 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 21:30:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:17,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:17,160 INFO L225 Difference]: With dead ends: 165 [2020-10-21 21:30:17,160 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 21:30:17,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 21:30:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 21:30:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 21:30:17,165 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 21:30:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:17,166 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 21:30:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 21:30:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:17,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:17,167 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:17,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:30:17,380 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 15 times [2020-10-21 21:30:17,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:17,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17252006] [2020-10-21 21:30:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:17,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17252006] [2020-10-21 21:30:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431905289] [2020-10-21 21:30:17,447 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:17,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:17,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:17,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:17,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:17,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685265236] [2020-10-21 21:30:17,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:17,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:17,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:17,588 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 21:30:17,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:17,813 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 21:30:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:17,814 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:17,815 INFO L225 Difference]: With dead ends: 158 [2020-10-21 21:30:17,816 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 21:30:17,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 21:30:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 21:30:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 21:30:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 21:30:17,822 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 21:30:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:17,822 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 21:30:17,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 21:30:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:17,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:17,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:18,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:30:18,035 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 16 times [2020-10-21 21:30:18,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:18,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752732114] [2020-10-21 21:30:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:18,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752732114] [2020-10-21 21:30:18,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541588875] [2020-10-21 21:30:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:18,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:18,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:18,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:18,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:18,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929659804] [2020-10-21 21:30:18,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:18,242 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 21:30:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:18,621 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 21:30:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:18,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:18,623 INFO L225 Difference]: With dead ends: 185 [2020-10-21 21:30:18,623 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 21:30:18,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 21:30:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 21:30:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 21:30:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 21:30:18,628 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 21:30:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:18,629 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 21:30:18,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 21:30:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:18,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:18,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:18,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:30:18,841 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 17 times [2020-10-21 21:30:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:18,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661253903] [2020-10-21 21:30:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661253903] [2020-10-21 21:30:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83254458] [2020-10-21 21:30:18,911 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:18,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:19,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:19,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:19,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811499138] [2020-10-21 21:30:19,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:19,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:19,046 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 21:30:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:19,456 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 21:30:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:19,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:19,458 INFO L225 Difference]: With dead ends: 194 [2020-10-21 21:30:19,458 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 21:30:19,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 21:30:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 21:30:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 21:30:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 21:30:19,464 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 21:30:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:19,464 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 21:30:19,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 21:30:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:19,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:19,465 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:19,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:30:19,677 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 18 times [2020-10-21 21:30:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:19,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286075120] [2020-10-21 21:30:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286075120] [2020-10-21 21:30:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134603140] [2020-10-21 21:30:19,744 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:19,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:19,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:19,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:19,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532615236] [2020-10-21 21:30:19,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:19,885 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:20,217 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 21:30:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:20,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:20,219 INFO L225 Difference]: With dead ends: 172 [2020-10-21 21:30:20,220 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:20,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 21:30:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 21:30:20,225 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 21:30:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:20,226 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 21:30:20,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 21:30:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:20,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:20,226 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:20,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:20,439 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:20,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-10-21 21:30:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:20,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901922785] [2020-10-21 21:30:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:20,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901922785] [2020-10-21 21:30:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771285845] [2020-10-21 21:30:20,514 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:20,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:20,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:20,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:20,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:20,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073733395] [2020-10-21 21:30:20,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:20,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:30:20,720 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 21:30:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:20,892 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 21:30:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:20,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 21:30:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:20,894 INFO L225 Difference]: With dead ends: 164 [2020-10-21 21:30:20,894 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 21:30:20,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:30:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 21:30:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 21:30:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 21:30:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 21:30:20,901 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 21:30:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:20,901 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 21:30:20,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 21:30:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:20,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:20,902 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:21,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 21:30:21,117 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-10-21 21:30:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:21,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340232890] [2020-10-21 21:30:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:21,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340232890] [2020-10-21 21:30:21,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514550916] [2020-10-21 21:30:21,195 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:21,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:21,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:21,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:21,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:21,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553944090] [2020-10-21 21:30:21,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:21,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:21,400 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 21:30:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:21,612 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 21:30:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:21,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 21:30:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:21,613 INFO L225 Difference]: With dead ends: 173 [2020-10-21 21:30:21,614 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:21,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 21:30:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:21,619 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 21:30:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:21,619 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:21,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:21,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:21,620 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:21,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 21:30:21,830 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 19 times [2020-10-21 21:30:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:21,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700629492] [2020-10-21 21:30:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700629492] [2020-10-21 21:30:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292789257] [2020-10-21 21:30:21,919 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:22,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:22,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:22,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068768285] [2020-10-21 21:30:22,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:22,111 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 21:30:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:22,450 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 21:30:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:22,450 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:22,451 INFO L225 Difference]: With dead ends: 183 [2020-10-21 21:30:22,452 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 21:30:22,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 21:30:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 21:30:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 21:30:22,457 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 21:30:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:22,457 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 21:30:22,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 21:30:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:22,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:22,458 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:22,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:22,671 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 20 times [2020-10-21 21:30:22,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:22,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210734265] [2020-10-21 21:30:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:22,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210734265] [2020-10-21 21:30:22,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228860789] [2020-10-21 21:30:22,748 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:22,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:22,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:25,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:25,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:25,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291885628] [2020-10-21 21:30:25,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:30:25,061 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 21:30:29,919 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:30:32,146 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-21 21:30:36,466 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-10-21 21:30:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:49,352 INFO L93 Difference]: Finished difference Result 212 states and 502 transitions. [2020-10-21 21:30:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:49,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:30:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:49,359 INFO L225 Difference]: With dead ends: 212 [2020-10-21 21:30:49,359 INFO L226 Difference]: Without dead ends: 207 [2020-10-21 21:30:49,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=274, Invalid=593, Unknown=3, NotChecked=0, Total=870 [2020-10-21 21:30:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-21 21:30:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-10-21 21:30:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 21:30:49,364 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 21:30:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:49,364 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 21:30:49,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 21:30:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:49,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:49,365 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:49,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:49,575 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 21 times [2020-10-21 21:30:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:49,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767852998] [2020-10-21 21:30:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:49,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767852998] [2020-10-21 21:30:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340228297] [2020-10-21 21:30:49,671 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:49,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:49,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269288943] [2020-10-21 21:30:49,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:49,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:49,855 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 21:30:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:50,204 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 21:30:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:50,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:50,207 INFO L225 Difference]: With dead ends: 184 [2020-10-21 21:30:50,207 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 21:30:50,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 21:30:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 21:30:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:30:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 21:30:50,212 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 21:30:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:50,212 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 21:30:50,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 21:30:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:50,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:50,213 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:50,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 21:30:50,425 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 22 times [2020-10-21 21:30:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:50,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48722767] [2020-10-21 21:30:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:50,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48722767] [2020-10-21 21:30:50,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481913631] [2020-10-21 21:30:50,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:50,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:50,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:50,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:50,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:50,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:50,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935714525] [2020-10-21 21:30:50,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:50,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:50,729 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 21:30:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:51,294 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 21:30:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:51,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:51,297 INFO L225 Difference]: With dead ends: 207 [2020-10-21 21:30:51,297 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 21:30:51,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:30:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 21:30:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 21:30:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:51,302 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 21:30:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:51,302 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:51,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:51,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:51,303 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:51,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:51,505 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 23 times [2020-10-21 21:30:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:51,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93388957] [2020-10-21 21:30:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93388957] [2020-10-21 21:30:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514122731] [2020-10-21 21:30:51,583 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:51,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:51,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:55,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:59,317 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 21:30:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:59,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:59,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:59,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605728606] [2020-10-21 21:30:59,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:59,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:59,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:59,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=167, Unknown=3, NotChecked=0, Total=240 [2020-10-21 21:30:59,320 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 21:31:03,448 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 21:31:07,689 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-21 21:31:09,944 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-21 21:31:26,470 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 21:31:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:47,024 INFO L93 Difference]: Finished difference Result 218 states and 526 transitions. [2020-10-21 21:31:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:31:47,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:31:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:47,059 INFO L225 Difference]: With dead ends: 218 [2020-10-21 21:31:47,059 INFO L226 Difference]: Without dead ends: 210 [2020-10-21 21:31:47,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=317, Invalid=731, Unknown=8, NotChecked=0, Total=1056 [2020-10-21 21:31:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-21 21:31:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 131. [2020-10-21 21:31:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:31:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 21:31:47,064 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 21:31:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:47,064 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 21:31:47,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:31:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 21:31:47,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:47,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:47,065 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 21:31:47,276 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:47,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 24 times [2020-10-21 21:31:47,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:47,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078702407] [2020-10-21 21:31:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078702407] [2020-10-21 21:31:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747047344] [2020-10-21 21:31:47,372 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:47,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:31:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:47,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:47,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:47,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:47,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483489959] [2020-10-21 21:31:47,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:47,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:47,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:47,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:47,648 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 15 states. [2020-10-21 21:31:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:48,275 INFO L93 Difference]: Finished difference Result 204 states and 491 transitions. [2020-10-21 21:31:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:31:48,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:48,277 INFO L225 Difference]: With dead ends: 204 [2020-10-21 21:31:48,277 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 21:31:48,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:31:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 21:31:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2020-10-21 21:31:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-21 21:31:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-10-21 21:31:48,283 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-10-21 21:31:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:48,283 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-10-21 21:31:48,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-10-21 21:31:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:48,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:48,284 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:48,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:48,497 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 25 times [2020-10-21 21:31:48,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:48,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319138037] [2020-10-21 21:31:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:48,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319138037] [2020-10-21 21:31:48,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005288151] [2020-10-21 21:31:48,573 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:48,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:48,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:48,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:48,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272947680] [2020-10-21 21:31:48,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:48,754 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 15 states. [2020-10-21 21:31:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:49,283 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-10-21 21:31:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:31:49,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:49,285 INFO L225 Difference]: With dead ends: 203 [2020-10-21 21:31:49,286 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 21:31:49,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:31:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 21:31:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-10-21 21:31:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 21:31:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-10-21 21:31:49,290 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-10-21 21:31:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:49,290 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-10-21 21:31:49,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-10-21 21:31:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:49,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:49,291 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:49,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 21:31:49,503 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 26 times [2020-10-21 21:31:49,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:49,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643886327] [2020-10-21 21:31:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:49,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643886327] [2020-10-21 21:31:49,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662339930] [2020-10-21 21:31:49,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:49,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:31:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:49,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:49,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:49,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:49,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959766424] [2020-10-21 21:31:49,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:49,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:49,736 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 15 states. [2020-10-21 21:31:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:50,333 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2020-10-21 21:31:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:31:50,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:50,335 INFO L225 Difference]: With dead ends: 204 [2020-10-21 21:31:50,335 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 21:31:50,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:31:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 21:31:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2020-10-21 21:31:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:31:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:31:50,339 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 21:31:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:50,340 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:31:50,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:31:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:50,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:50,341 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:50,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 21:31:50,542 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 27 times [2020-10-21 21:31:50,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:50,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922941198] [2020-10-21 21:31:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922941198] [2020-10-21 21:31:50,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284815272] [2020-10-21 21:31:50,631 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:50,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:31:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:50,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:50,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:50,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:50,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274006295] [2020-10-21 21:31:50,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:50,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:50,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:50,797 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 21:31:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:51,403 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2020-10-21 21:31:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:51,404 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:51,405 INFO L225 Difference]: With dead ends: 221 [2020-10-21 21:31:51,405 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 21:31:51,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 21:31:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-10-21 21:31:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:31:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-10-21 21:31:51,411 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-10-21 21:31:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:51,412 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-10-21 21:31:51,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-10-21 21:31:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:51,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:51,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:51,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 21:31:51,624 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:51,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 28 times [2020-10-21 21:31:51,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:51,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658516160] [2020-10-21 21:31:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:51,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658516160] [2020-10-21 21:31:51,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609083596] [2020-10-21 21:31:51,701 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:51,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:31:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:51,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:51,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:51,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942500677] [2020-10-21 21:31:51,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:51,864 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 15 states. [2020-10-21 21:31:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:52,418 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-10-21 21:31:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:52,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:52,421 INFO L225 Difference]: With dead ends: 211 [2020-10-21 21:31:52,421 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 21:31:52,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 21:31:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-21 21:31:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:31:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:31:52,426 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 21:31:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:52,426 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:31:52,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:31:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:52,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:52,427 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:52,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 21:31:52,638 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 29 times [2020-10-21 21:31:52,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:52,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661544485] [2020-10-21 21:31:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:52,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661544485] [2020-10-21 21:31:52,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030770404] [2020-10-21 21:31:52,729 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:52,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:31:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:52,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:52,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:52,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003610142] [2020-10-21 21:31:52,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:52,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:52,932 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 21:31:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:53,666 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-10-21 21:31:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:31:53,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:53,669 INFO L225 Difference]: With dead ends: 210 [2020-10-21 21:31:53,669 INFO L226 Difference]: Without dead ends: 205 [2020-10-21 21:31:53,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:31:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-21 21:31:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-10-21 21:31:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:31:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 21:31:53,674 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 21:31:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:53,675 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 21:31:53,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 21:31:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:53,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:53,676 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:53,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 21:31:53,880 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 30 times [2020-10-21 21:31:53,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:53,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868095554] [2020-10-21 21:31:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868095554] [2020-10-21 21:31:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212796223] [2020-10-21 21:31:53,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:54,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:31:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:54,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:54,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:54,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603900717] [2020-10-21 21:31:54,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:54,130 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 21:31:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:54,452 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 21:31:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:31:54,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:54,454 INFO L225 Difference]: With dead ends: 189 [2020-10-21 21:31:54,454 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 21:31:54,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:31:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 21:31:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 21:31:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:31:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 21:31:54,458 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 21:31:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:54,459 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 21:31:54,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 21:31:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:54,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:54,459 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:54,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 21:31:54,660 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 31 times [2020-10-21 21:31:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:54,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272648864] [2020-10-21 21:31:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:54,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272648864] [2020-10-21 21:31:54,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839095058] [2020-10-21 21:31:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:54,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:54,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:54,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:31:54,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406291133] [2020-10-21 21:31:54,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:31:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:31:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:31:54,967 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 21:31:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:55,549 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 21:31:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:31:55,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:31:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:55,551 INFO L225 Difference]: With dead ends: 218 [2020-10-21 21:31:55,551 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 21:31:55,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:31:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 21:31:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 21:31:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 21:31:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 21:31:55,555 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 21:31:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:55,556 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 21:31:55,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:31:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 21:31:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:55,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:55,557 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:55,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 21:31:55,768 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 32 times [2020-10-21 21:31:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:55,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419409047] [2020-10-21 21:31:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:55,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419409047] [2020-10-21 21:31:55,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704863061] [2020-10-21 21:31:55,843 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:31:55,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:31:55,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:56,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:32:00,137 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-21 21:32:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:00,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:00,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:32:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962595198] [2020-10-21 21:32:00,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:32:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:32:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:32:00,141 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 21:32:02,062 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-21 21:32:08,248 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:32:39,195 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-10-21 21:33:20,259 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-21 21:33:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:34,388 INFO L93 Difference]: Finished difference Result 258 states and 610 transitions. [2020-10-21 21:33:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-21 21:33:34,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:33:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:34,420 INFO L225 Difference]: With dead ends: 258 [2020-10-21 21:33:34,420 INFO L226 Difference]: Without dead ends: 248 [2020-10-21 21:33:34,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=382, Invalid=934, Unknown=16, NotChecked=0, Total=1332 [2020-10-21 21:33:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-21 21:33:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 137. [2020-10-21 21:33:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 21:33:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-10-21 21:33:34,426 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-10-21 21:33:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:34,427 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-10-21 21:33:34,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:33:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-10-21 21:33:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:34,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:34,428 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:34,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:34,629 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash -631278696, now seen corresponding path program 33 times [2020-10-21 21:33:34,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:34,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131363334] [2020-10-21 21:33:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:34,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131363334] [2020-10-21 21:33:34,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429835482] [2020-10-21 21:33:34,739 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:34,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:33:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:34,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:34,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:34,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055534683] [2020-10-21 21:33:34,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:34,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:35,000 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 15 states. [2020-10-21 21:33:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:35,969 INFO L93 Difference]: Finished difference Result 234 states and 555 transitions. [2020-10-21 21:33:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:35,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:35,972 INFO L225 Difference]: With dead ends: 234 [2020-10-21 21:33:35,973 INFO L226 Difference]: Without dead ends: 226 [2020-10-21 21:33:35,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:33:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-21 21:33:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 135. [2020-10-21 21:33:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:33:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-21 21:33:35,979 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-21 21:33:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:35,979 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-21 21:33:35,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-21 21:33:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:35,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:35,980 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:36,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 21:33:36,193 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -630385927, now seen corresponding path program 34 times [2020-10-21 21:33:36,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:36,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980835248] [2020-10-21 21:33:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:36,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980835248] [2020-10-21 21:33:36,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867334922] [2020-10-21 21:33:36,303 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:36,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:33:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:36,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:36,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:36,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:36,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030420765] [2020-10-21 21:33:36,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:36,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:36,500 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-21 21:33:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:37,245 INFO L93 Difference]: Finished difference Result 238 states and 569 transitions. [2020-10-21 21:33:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:37,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:37,247 INFO L225 Difference]: With dead ends: 238 [2020-10-21 21:33:37,248 INFO L226 Difference]: Without dead ends: 230 [2020-10-21 21:33:37,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:33:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-21 21:33:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2020-10-21 21:33:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:33:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 21:33:37,253 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 21:33:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:37,253 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 21:33:37,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 21:33:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:37,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:37,254 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:37,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:37,465 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -630384966, now seen corresponding path program 35 times [2020-10-21 21:33:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:37,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353844270] [2020-10-21 21:33:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353844270] [2020-10-21 21:33:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602529968] [2020-10-21 21:33:37,567 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:37,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:33:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:37,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:37,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:37,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968388935] [2020-10-21 21:33:37,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:37,778 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 21:33:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:38,515 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-10-21 21:33:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:33:38,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:38,518 INFO L225 Difference]: With dead ends: 239 [2020-10-21 21:33:38,518 INFO L226 Difference]: Without dead ends: 231 [2020-10-21 21:33:38,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:33:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-21 21:33:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 132. [2020-10-21 21:33:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:33:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 326 transitions. [2020-10-21 21:33:38,524 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 326 transitions. Word has length 13 [2020-10-21 21:33:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:38,525 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 326 transitions. [2020-10-21 21:33:38,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 326 transitions. [2020-10-21 21:33:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:38,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:38,526 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:38,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 21:33:38,739 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash -630356136, now seen corresponding path program 36 times [2020-10-21 21:33:38,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:38,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684572657] [2020-10-21 21:33:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:38,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684572657] [2020-10-21 21:33:38,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899115098] [2020-10-21 21:33:38,851 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:38,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:33:38,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:33:38,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:39,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:39,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:39,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:33:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678427094] [2020-10-21 21:33:39,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:33:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:33:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:33:39,092 INFO L87 Difference]: Start difference. First operand 132 states and 326 transitions. Second operand 15 states. [2020-10-21 21:33:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:39,874 INFO L93 Difference]: Finished difference Result 228 states and 537 transitions. [2020-10-21 21:33:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:33:39,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:33:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:39,876 INFO L225 Difference]: With dead ends: 228 [2020-10-21 21:33:39,876 INFO L226 Difference]: Without dead ends: 220 [2020-10-21 21:33:39,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:33:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-21 21:33:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2020-10-21 21:33:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 21:33:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-21 21:33:39,883 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-21 21:33:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:39,884 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-21 21:33:39,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:33:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-21 21:33:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:39,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:39,885 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:40,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:40,096 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash -353491858, now seen corresponding path program 6 times [2020-10-21 21:33:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:40,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195835233] [2020-10-21 21:33:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:40,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195835233] [2020-10-21 21:33:40,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704483201] [2020-10-21 21:33:40,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:40,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:33:40,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:40,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:40,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:40,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 21:33:40,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398337383] [2020-10-21 21:33:40,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:33:40,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:33:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:33:40,485 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-21 21:33:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:40,728 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-21 21:33:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:33:40,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-21 21:33:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:40,730 INFO L225 Difference]: With dead ends: 185 [2020-10-21 21:33:40,731 INFO L226 Difference]: Without dead ends: 180 [2020-10-21 21:33:40,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:33:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-21 21:33:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-21 21:33:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 21:33:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-21 21:33:40,734 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-21 21:33:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:40,735 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-21 21:33:40,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:33:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-21 21:33:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:33:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:40,736 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:40,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 21:33:40,937 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1320134055, now seen corresponding path program 6 times [2020-10-21 21:33:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:40,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292575169] [2020-10-21 21:33:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292575169] [2020-10-21 21:33:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838656681] [2020-10-21 21:33:41,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:41,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:33:41,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:41,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:41,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:41,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 21:33:41,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494950915] [2020-10-21 21:33:41,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:33:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:33:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:33:41,291 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-21 21:33:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:41,596 INFO L93 Difference]: Finished difference Result 199 states and 474 transitions. [2020-10-21 21:33:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:33:41,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-21 21:33:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:41,598 INFO L225 Difference]: With dead ends: 199 [2020-10-21 21:33:41,599 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 21:33:41,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:33:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 21:33:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2020-10-21 21:33:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 21:33:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-21 21:33:41,604 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-21 21:33:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:41,605 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-21 21:33:41,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:33:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-21 21:33:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:41,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:41,606 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:41,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 21:33:41,818 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 161462414, now seen corresponding path program 37 times [2020-10-21 21:33:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:41,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832467447] [2020-10-21 21:33:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:41,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832467447] [2020-10-21 21:33:41,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916252572] [2020-10-21 21:33:41,939 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:42,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:33:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:42,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:42,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-21 21:33:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862177355] [2020-10-21 21:33:42,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:33:42,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:33:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:33:42,197 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-21 21:33:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:33:42,753 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-10-21 21:33:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:33:42,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-21 21:33:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:33:42,755 INFO L225 Difference]: With dead ends: 214 [2020-10-21 21:33:42,755 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 21:33:42,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:33:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 21:33:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 150. [2020-10-21 21:33:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-21 21:33:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2020-10-21 21:33:42,761 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 14 [2020-10-21 21:33:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:33:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2020-10-21 21:33:42,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:33:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2020-10-21 21:33:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:33:42,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:33:42,762 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:33:42,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 21:33:42,973 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:33:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:33:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash 161491244, now seen corresponding path program 38 times [2020-10-21 21:33:42,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:33:42,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807873154] [2020-10-21 21:33:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:33:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:33:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:43,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807873154] [2020-10-21 21:33:43,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408772755] [2020-10-21 21:33:43,101 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:33:43,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:33:43,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:33:43,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:33:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:33:43,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:47,470 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 21:33:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-21 21:33:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091469678] [2020-10-21 21:33:47,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:33:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:33:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-21 21:33:47,474 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand 18 states. [2020-10-21 21:33:51,702 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:33:58,406 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 Received shutdown request... [2020-10-21 21:34:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-21 21:34:04,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 21:34:04,789 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 21:34:04,794 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 21:34:04,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:34:04 BasicIcfg [2020-10-21 21:34:04,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:34:04,796 INFO L168 Benchmark]: Toolchain (without parser) took 278519.23 ms. Allocated memory was 146.3 MB in the beginning and 320.3 MB in the end (delta: 174.1 MB). Free memory was 101.6 MB in the beginning and 267.4 MB in the end (delta: -165.8 MB). Peak memory consumption was 8.2 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,796 INFO L168 Benchmark]: CDTParser took 3.16 ms. Allocated memory is still 146.3 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.47 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 100.5 MB in the beginning and 158.7 MB in the end (delta: -58.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.95 ms. Allocated memory is still 202.9 MB. Free memory was 158.7 MB in the beginning and 156.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,797 INFO L168 Benchmark]: Boogie Preprocessor took 29.14 ms. Allocated memory is still 202.9 MB. Free memory was 156.6 MB in the beginning and 155.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,797 INFO L168 Benchmark]: RCFGBuilder took 433.45 ms. Allocated memory is still 202.9 MB. Free memory was 155.3 MB in the beginning and 132.6 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:04,797 INFO L168 Benchmark]: TraceAbstraction took 277219.35 ms. Allocated memory was 202.9 MB in the beginning and 320.3 MB in the end (delta: 117.4 MB). Free memory was 131.9 MB in the beginning and 267.4 MB in the end (delta: -135.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-21 21:34:04,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.16 ms. Allocated memory is still 146.3 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 754.47 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 100.5 MB in the beginning and 158.7 MB in the end (delta: -58.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.95 ms. Allocated memory is still 202.9 MB. Free memory was 158.7 MB in the beginning and 156.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.14 ms. Allocated memory is still 202.9 MB. Free memory was 156.6 MB in the beginning and 155.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.45 ms. Allocated memory is still 202.9 MB. Free memory was 155.3 MB in the beginning and 132.6 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 277219.35 ms. Allocated memory was 202.9 MB in the beginning and 320.3 MB in the end (delta: 117.4 MB). Free memory was 131.9 MB in the beginning and 267.4 MB in the end (delta: -135.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 866 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (150states) and FLOYD_HOARE automaton (currently 22 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (218 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 277.0s, OverallIterations: 51, TraceHistogramMax: 6, AutomataDifference: 230.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 661 SDtfs, 5773 SDslu, 4642 SDs, 0 SdLazy, 3364 SolverSat, 997 SolverUnsat, 55 SolverUnknown, 0 SolverNotchecked, 108.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1366 GetRequests, 220 SyntacticMatches, 41 SemanticMatches, 1105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6200 ImplicationChecksByTransitivity, 148.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 50 MinimizatonAttempts, 2466 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 31.5s InterpolantComputationTime, 1158 NumberOfCodeBlocks, 1158 NumberOfCodeBlocksAsserted, 149 NumberOfCheckSat, 1061 ConstructedInterpolants, 7 QuantifiedInterpolants, 99895 SizeOfPredicates, 46 NumberOfNonLiveVariables, 4528 ConjunctsInSsa, 430 ConjunctsInUnsatCore, 97 InterpolantComputations, 5 PerfectInterpolantSequences, 0/406 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown