/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:58:01,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:58:01,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:58:01,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 22:58:01,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 22:58:01,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 22:58:01,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 22:58:01,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 22:58:01,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 22:58:01,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 22:58:01,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 22:58:01,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 22:58:01,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:58:01,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:58:01,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:58:01,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:58:01,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:58:01,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:58:01,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:58:01,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:58:01,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:58:01,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:58:01,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:58:01,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:58:01,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 22:58:01,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 22:58:01,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 22:58:01,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 22:58:01,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 22:58:01,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 22:58:01,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 22:58:01,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 22:58:01,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 22:58:01,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:58:01,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:58:01,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:58:01,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 22:58:01,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:58:01,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:58:01,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:58:01,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:58:01,420 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:58:01,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:58:01,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:58:01,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:58:01,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:58:01,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:58:01,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:58:01,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:58:01,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:58:01,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:58:01,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:58:01,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:58:01,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:58:01,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:58:01,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:58:01,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:58:01,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:58:01,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:58:01,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:58:01,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:58:01,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:58:01,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:58:01,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:58:01,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:58:01,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:58:01,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:58:01,917 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:58:01,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2021-01-06 22:58:02,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23d295277/4809cf3cad924fe7b234800634f0b162/FLAGbc6d6bd8e [2021-01-06 22:58:02,863 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:58:02,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2021-01-06 22:58:02,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23d295277/4809cf3cad924fe7b234800634f0b162/FLAGbc6d6bd8e [2021-01-06 22:58:03,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/23d295277/4809cf3cad924fe7b234800634f0b162 [2021-01-06 22:58:03,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:58:03,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:58:03,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:58:03,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:58:03,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:58:03,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592caba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03, skipping insertion in model container [2021-01-06 22:58:03,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:58:03,128 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:58:03,508 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2021-01-06 22:58:03,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:58:03,533 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:58:03,619 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2021-01-06 22:58:03,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:58:03,749 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:58:03,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03 WrapperNode [2021-01-06 22:58:03,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:58:03,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:58:03,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:58:03,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:58:03,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:58:03,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:58:03,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:58:03,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:58:03,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... [2021-01-06 22:58:03,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:58:03,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:58:03,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:58:03,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:58:03,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-06 22:58:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-06 22:58:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-06 22:58:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-06 22:58:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:58:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-06 22:58:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:58:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:58:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:58:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-06 22:58:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:58:04,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:58:04,070 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-06 22:58:04,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:58:04,523 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 22:58:04,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:58:04 BoogieIcfgContainer [2021-01-06 22:58:04,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:58:04,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:58:04,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:58:04,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:58:04,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:58:03" (1/3) ... [2021-01-06 22:58:04,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee9187c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:58:04, skipping insertion in model container [2021-01-06 22:58:04,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:58:03" (2/3) ... [2021-01-06 22:58:04,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee9187c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:58:04, skipping insertion in model container [2021-01-06 22:58:04,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:58:04" (3/3) ... [2021-01-06 22:58:04,540 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-01-06 22:58:04,550 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:58:04,550 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:58:04,557 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 22:58:04,559 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:58:04,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,599 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,599 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,600 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,600 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,601 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,602 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,603 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,603 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,603 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,604 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,604 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,605 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,606 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,607 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,607 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,607 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,608 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,608 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,608 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,608 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,609 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,611 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,611 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,611 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,616 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,616 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,617 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,617 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,625 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,626 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:58:04,629 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-06 22:58:04,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 22:58:04,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:58:04,676 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:58:04,676 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:58:04,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:58:04,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:58:04,676 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:58:04,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:58:04,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:58:04,690 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:58:04,692 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:58:04,696 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:58:04,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2021-01-06 22:58:04,746 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2021-01-06 22:58:04,747 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-01-06 22:58:04,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-01-06 22:58:04,755 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2021-01-06 22:58:06,865 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:58:07,024 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:58:07,694 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:58:07,886 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:58:08,196 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:58:08,337 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:58:08,359 INFO L131 LiptonReduction]: Checked pairs total: 998 [2021-01-06 22:58:08,360 INFO L133 LiptonReduction]: Total number of compositions: 52 [2021-01-06 22:58:08,367 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-01-06 22:58:08,378 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2021-01-06 22:58:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 22:58:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 22:58:08,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:08,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,388 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2021-01-06 22:58:08,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21544657] [2021-01-06 22:58:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21544657] [2021-01-06 22:58:08,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:08,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:58:08,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287339937] [2021-01-06 22:58:08,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:58:08,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:58:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:58:08,749 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-01-06 22:58:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:08,834 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2021-01-06 22:58:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:58:08,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 22:58:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:08,851 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:08,851 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 22:58:08,853 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 [2021-01-06 22:58:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 22:58:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-01-06 22:58:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:58:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2021-01-06 22:58:08,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2021-01-06 22:58:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:08,913 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2021-01-06 22:58:08,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:58:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2021-01-06 22:58:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:58:08,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:08,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 22:58:08,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2021-01-06 22:58:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870917082] [2021-01-06 22:58:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870917082] [2021-01-06 22:58:09,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:09,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:58:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635188075] [2021-01-06 22:58:09,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:58:09,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:58:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:09,066 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2021-01-06 22:58:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,126 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2021-01-06 22:58:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:58:09,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:58:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,131 INFO L225 Difference]: With dead ends: 86 [2021-01-06 22:58:09,131 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 22:58:09,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 22:58:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-01-06 22:58:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 22:58:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2021-01-06 22:58:09,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2021-01-06 22:58:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,145 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2021-01-06 22:58:09,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:58:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2021-01-06 22:58:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:58:09,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 22:58:09,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2021-01-06 22:58:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443327110] [2021-01-06 22:58:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443327110] [2021-01-06 22:58:09,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:09,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:58:09,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490062169] [2021-01-06 22:58:09,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:58:09,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:58:09,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:09,235 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2021-01-06 22:58:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,303 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2021-01-06 22:58:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:58:09,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:58:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,305 INFO L225 Difference]: With dead ends: 62 [2021-01-06 22:58:09,305 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 22:58:09,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:58:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 22:58:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 22:58:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:58:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2021-01-06 22:58:09,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2021-01-06 22:58:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,314 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2021-01-06 22:58:09,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:58:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2021-01-06 22:58:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:58:09,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 22:58:09,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2021-01-06 22:58:09,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514591412] [2021-01-06 22:58:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514591412] [2021-01-06 22:58:09,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:09,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:58:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132908694] [2021-01-06 22:58:09,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:58:09,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:58:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:58:09,430 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2021-01-06 22:58:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,491 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2021-01-06 22:58:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:58:09,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:58:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,497 INFO L225 Difference]: With dead ends: 56 [2021-01-06 22:58:09,498 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 22:58:09,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:58:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 22:58:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 22:58:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:58:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-01-06 22:58:09,505 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-01-06 22:58:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,506 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-01-06 22:58:09,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:58:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-01-06 22:58:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:09,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 22:58:09,508 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2021-01-06 22:58:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131157575] [2021-01-06 22:58:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131157575] [2021-01-06 22:58:09,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:09,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404209489] [2021-01-06 22:58:09,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:09,600 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2021-01-06 22:58:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,684 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2021-01-06 22:58:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:58:09,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,688 INFO L225 Difference]: With dead ends: 58 [2021-01-06 22:58:09,689 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 22:58:09,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 22:58:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-01-06 22:58:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 22:58:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2021-01-06 22:58:09,719 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2021-01-06 22:58:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,719 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2021-01-06 22:58:09,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2021-01-06 22:58:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:09,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 22:58:09,722 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2021-01-06 22:58:09,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664339880] [2021-01-06 22:58:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664339880] [2021-01-06 22:58:09,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:09,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884835515] [2021-01-06 22:58:09,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:09,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:09,840 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2021-01-06 22:58:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,912 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2021-01-06 22:58:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:58:09,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,918 INFO L225 Difference]: With dead ends: 78 [2021-01-06 22:58:09,918 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:09,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-01-06 22:58:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:58:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2021-01-06 22:58:09,939 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2021-01-06 22:58:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,941 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2021-01-06 22:58:09,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2021-01-06 22:58:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:09,942 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 22:58:09,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2021-01-06 22:58:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235112131] [2021-01-06 22:58:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235112131] [2021-01-06 22:58:10,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:10,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:10,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678526952] [2021-01-06 22:58:10,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:10,066 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2021-01-06 22:58:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,160 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2021-01-06 22:58:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:58:10,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,161 INFO L225 Difference]: With dead ends: 54 [2021-01-06 22:58:10,161 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 22:58:10,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 22:58:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-01-06 22:58:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 22:58:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2021-01-06 22:58:10,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2021-01-06 22:58:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,166 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2021-01-06 22:58:10,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2021-01-06 22:58:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:10,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 22:58:10,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2021-01-06 22:58:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854999219] [2021-01-06 22:58:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854999219] [2021-01-06 22:58:10,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:10,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580859547] [2021-01-06 22:58:10,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:10,228 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2021-01-06 22:58:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,348 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2021-01-06 22:58:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:58:10,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,350 INFO L225 Difference]: With dead ends: 55 [2021-01-06 22:58:10,350 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:58:10,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:58:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-01-06 22:58:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 22:58:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-01-06 22:58:10,355 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-01-06 22:58:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,355 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-01-06 22:58:10,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-01-06 22:58:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:10,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,356 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 22:58:10,356 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2021-01-06 22:58:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6445452] [2021-01-06 22:58:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6445452] [2021-01-06 22:58:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104203006] [2021-01-06 22:58:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:10,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:10,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:10,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-01-06 22:58:10,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203104009] [2021-01-06 22:58:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 22:58:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 22:58:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:58:10,594 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2021-01-06 22:58:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,705 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2021-01-06 22:58:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:58:10,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-06 22:58:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,706 INFO L225 Difference]: With dead ends: 55 [2021-01-06 22:58:10,706 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:58:10,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:58:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-01-06 22:58:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 22:58:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-01-06 22:58:10,711 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2021-01-06 22:58:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,711 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-01-06 22:58:10,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 22:58:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-01-06 22:58:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:10,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,712 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 22:58:10,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2021-01-06 22:58:10,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642711983] [2021-01-06 22:58:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:11,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642711983] [2021-01-06 22:58:11,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050066527] [2021-01-06 22:58:11,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:11,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:58:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:11,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:11,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 22:58:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65616716] [2021-01-06 22:58:11,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:11,155 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2021-01-06 22:58:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:11,276 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2021-01-06 22:58:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:58:11,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 22:58:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:11,277 INFO L225 Difference]: With dead ends: 72 [2021-01-06 22:58:11,278 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 22:58:11,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 22:58:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2021-01-06 22:58:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 22:58:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 121 transitions. [2021-01-06 22:58:11,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 121 transitions. Word has length 11 [2021-01-06 22:58:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:11,284 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 121 transitions. [2021-01-06 22:58:11,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 121 transitions. [2021-01-06 22:58:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:11,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:11,285 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:11,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 22:58:11,499 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1328990746, now seen corresponding path program 7 times [2021-01-06 22:58:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:11,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422765489] [2021-01-06 22:58:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422765489] [2021-01-06 22:58:11,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292289840] [2021-01-06 22:58:11,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:11,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-01-06 22:58:11,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612496488] [2021-01-06 22:58:11,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 22:58:11,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 22:58:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:58:11,673 INFO L87 Difference]: Start difference. First operand 51 states and 121 transitions. Second operand 7 states. [2021-01-06 22:58:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:11,790 INFO L93 Difference]: Finished difference Result 92 states and 215 transitions. [2021-01-06 22:58:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:11,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 22:58:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:11,791 INFO L225 Difference]: With dead ends: 92 [2021-01-06 22:58:11,791 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:11,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-01-06 22:58:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2021-01-06 22:58:11,797 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 12 [2021-01-06 22:58:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:11,797 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2021-01-06 22:58:11,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 22:58:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2021-01-06 22:58:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:11,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:11,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:12,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 22:58:12,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1328272662, now seen corresponding path program 8 times [2021-01-06 22:58:12,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:12,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866073817] [2021-01-06 22:58:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866073817] [2021-01-06 22:58:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089296349] [2021-01-06 22:58:12,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:12,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:12,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 22:58:12,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129564610] [2021-01-06 22:58:12,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:12,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:12,249 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand 10 states. [2021-01-06 22:58:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:12,438 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2021-01-06 22:58:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:58:12,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2021-01-06 22:58:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:12,440 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:12,440 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 22:58:12,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 22:58:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2021-01-06 22:58:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 22:58:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-01-06 22:58:12,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2021-01-06 22:58:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:12,445 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-01-06 22:58:12,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-01-06 22:58:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:12,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:12,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:12,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:12,662 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:12,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1277025601, now seen corresponding path program 9 times [2021-01-06 22:58:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:12,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715846515] [2021-01-06 22:58:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715846515] [2021-01-06 22:58:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701770329] [2021-01-06 22:58:12,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:58:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:12,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:12,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 22:58:12,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311667441] [2021-01-06 22:58:12,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:12,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:12,908 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 10 states. [2021-01-06 22:58:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,053 INFO L93 Difference]: Finished difference Result 60 states and 137 transitions. [2021-01-06 22:58:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:58:13,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 22:58:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,054 INFO L225 Difference]: With dead ends: 60 [2021-01-06 22:58:13,055 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 22:58:13,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 22:58:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-01-06 22:58:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 22:58:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 113 transitions. [2021-01-06 22:58:13,059 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 113 transitions. Word has length 13 [2021-01-06 22:58:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,059 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 113 transitions. [2021-01-06 22:58:13,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 113 transitions. [2021-01-06 22:58:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:13,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,060 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:13,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 22:58:13,274 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 226675059, now seen corresponding path program 10 times [2021-01-06 22:58:13,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:13,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134199244] [2021-01-06 22:58:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134199244] [2021-01-06 22:58:13,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722842101] [2021-01-06 22:58:13,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:13,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:13,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:13,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839418541] [2021-01-06 22:58:13,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:13,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:13,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:13,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:13,457 INFO L87 Difference]: Start difference. First operand 48 states and 113 transitions. Second operand 9 states. [2021-01-06 22:58:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,561 INFO L93 Difference]: Finished difference Result 80 states and 181 transitions. [2021-01-06 22:58:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:58:13,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 22:58:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,563 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:58:13,563 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 22:58:13,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 22:58:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-01-06 22:58:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2021-01-06 22:58:13,568 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 13 [2021-01-06 22:58:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,568 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2021-01-06 22:58:13,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2021-01-06 22:58:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:13,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:13,785 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:13,786 INFO L82 PathProgramCache]: Analyzing trace with hash 916634619, now seen corresponding path program 11 times [2021-01-06 22:58:13,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:13,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764889486] [2021-01-06 22:58:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764889486] [2021-01-06 22:58:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119332492] [2021-01-06 22:58:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:13,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:13,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560994704] [2021-01-06 22:58:13,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:13,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:14,006 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand 9 states. [2021-01-06 22:58:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:14,145 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2021-01-06 22:58:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:14,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 22:58:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:14,147 INFO L225 Difference]: With dead ends: 102 [2021-01-06 22:58:14,147 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 22:58:14,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 22:58:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2021-01-06 22:58:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 149 transitions. [2021-01-06 22:58:14,158 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 149 transitions. Word has length 13 [2021-01-06 22:58:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 149 transitions. [2021-01-06 22:58:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 149 transitions. [2021-01-06 22:58:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:14,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:14,159 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:14,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 22:58:14,373 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash 917352703, now seen corresponding path program 12 times [2021-01-06 22:58:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974310874] [2021-01-06 22:58:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:14,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974310874] [2021-01-06 22:58:14,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913731687] [2021-01-06 22:58:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:14,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:58:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:14,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:14,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 22:58:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433586809] [2021-01-06 22:58:14,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:14,566 INFO L87 Difference]: Start difference. First operand 59 states and 149 transitions. Second operand 10 states. [2021-01-06 22:58:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:14,790 INFO L93 Difference]: Finished difference Result 80 states and 190 transitions. [2021-01-06 22:58:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:14,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 22:58:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:14,792 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:58:14,792 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 22:58:14,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 22:58:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2021-01-06 22:58:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2021-01-06 22:58:14,795 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 13 [2021-01-06 22:58:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:14,796 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2021-01-06 22:58:14,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2021-01-06 22:58:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:14,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:14,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:15,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 22:58:15,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash 933092168, now seen corresponding path program 13 times [2021-01-06 22:58:15,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:15,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808710355] [2021-01-06 22:58:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808710355] [2021-01-06 22:58:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113819394] [2021-01-06 22:58:15,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:15,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 22:58:15,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929539759] [2021-01-06 22:58:15,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:15,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:15,227 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 11 states. [2021-01-06 22:58:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:15,385 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2021-01-06 22:58:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:58:15,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2021-01-06 22:58:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:15,387 INFO L225 Difference]: With dead ends: 69 [2021-01-06 22:58:15,387 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 22:58:15,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 22:58:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-01-06 22:58:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2021-01-06 22:58:15,391 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 14 [2021-01-06 22:58:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:15,392 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2021-01-06 22:58:15,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2021-01-06 22:58:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:15,392 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:15,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:15,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 22:58:15,606 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:15,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1563003562, now seen corresponding path program 14 times [2021-01-06 22:58:15,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:15,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723939604] [2021-01-06 22:58:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723939604] [2021-01-06 22:58:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472624827] [2021-01-06 22:58:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:15,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:15,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:15,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:15,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566180355] [2021-01-06 22:58:15,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:15,811 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 10 states. [2021-01-06 22:58:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:15,952 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2021-01-06 22:58:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:15,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:15,954 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:58:15,954 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:58:15,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:58:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2021-01-06 22:58:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 139 transitions. [2021-01-06 22:58:15,958 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 139 transitions. Word has length 14 [2021-01-06 22:58:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:15,958 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 139 transitions. [2021-01-06 22:58:15,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 139 transitions. [2021-01-06 22:58:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:15,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:15,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:16,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 22:58:16,175 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1649093682, now seen corresponding path program 15 times [2021-01-06 22:58:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:16,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783885033] [2021-01-06 22:58:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783885033] [2021-01-06 22:58:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593059862] [2021-01-06 22:58:16,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:16,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:58:16,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:16,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932647122] [2021-01-06 22:58:16,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:16,358 INFO L87 Difference]: Start difference. First operand 57 states and 139 transitions. Second operand 10 states. [2021-01-06 22:58:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:16,580 INFO L93 Difference]: Finished difference Result 85 states and 195 transitions. [2021-01-06 22:58:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:16,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:16,582 INFO L225 Difference]: With dead ends: 85 [2021-01-06 22:58:16,582 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:16,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-01-06 22:58:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 139 transitions. [2021-01-06 22:58:16,586 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 139 transitions. Word has length 14 [2021-01-06 22:58:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:16,586 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 139 transitions. [2021-01-06 22:58:16,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 139 transitions. [2021-01-06 22:58:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:16,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:16,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:16,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:16,801 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1626836922, now seen corresponding path program 16 times [2021-01-06 22:58:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:16,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127252690] [2021-01-06 22:58:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127252690] [2021-01-06 22:58:16,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592030566] [2021-01-06 22:58:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:16,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:16,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:16,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328931720] [2021-01-06 22:58:17,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:17,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:17,001 INFO L87 Difference]: Start difference. First operand 57 states and 139 transitions. Second operand 10 states. [2021-01-06 22:58:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:17,203 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2021-01-06 22:58:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:17,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:17,205 INFO L225 Difference]: With dead ends: 102 [2021-01-06 22:58:17,205 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:17,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 57. [2021-01-06 22:58:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2021-01-06 22:58:17,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 14 [2021-01-06 22:58:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:17,210 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2021-01-06 22:58:17,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2021-01-06 22:58:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:17,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:17,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:17,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:17,425 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1626814602, now seen corresponding path program 17 times [2021-01-06 22:58:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:17,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90149671] [2021-01-06 22:58:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90149671] [2021-01-06 22:58:17,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935767245] [2021-01-06 22:58:17,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:17,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:58:17,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:17,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790897389] [2021-01-06 22:58:17,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:17,643 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 12 states. [2021-01-06 22:58:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:18,022 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2021-01-06 22:58:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:18,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-06 22:58:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:18,024 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:18,024 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 22:58:18,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 22:58:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-01-06 22:58:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2021-01-06 22:58:18,031 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 14 [2021-01-06 22:58:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:18,033 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2021-01-06 22:58:18,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2021-01-06 22:58:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:18,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:18,034 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:18,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 22:58:18,248 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash -950727129, now seen corresponding path program 18 times [2021-01-06 22:58:18,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:18,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996436272] [2021-01-06 22:58:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996436272] [2021-01-06 22:58:18,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256392438] [2021-01-06 22:58:18,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:18,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:58:18,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:18,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309965129] [2021-01-06 22:58:18,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:18,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:18,473 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand 12 states. [2021-01-06 22:58:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:18,674 INFO L93 Difference]: Finished difference Result 77 states and 177 transitions. [2021-01-06 22:58:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:18,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:58:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:18,676 INFO L225 Difference]: With dead ends: 77 [2021-01-06 22:58:18,676 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:18,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:58:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-01-06 22:58:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 22:58:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2021-01-06 22:58:18,679 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 15 [2021-01-06 22:58:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:18,680 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2021-01-06 22:58:18,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2021-01-06 22:58:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:18,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:18,680 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:18,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:18,893 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1036817249, now seen corresponding path program 19 times [2021-01-06 22:58:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:18,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978554231] [2021-01-06 22:58:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978554231] [2021-01-06 22:58:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777663632] [2021-01-06 22:58:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:19,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:19,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:19,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743466772] [2021-01-06 22:58:19,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:19,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:19,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:19,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:19,121 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 12 states. [2021-01-06 22:58:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:19,402 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2021-01-06 22:58:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:19,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:58:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:19,404 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:19,404 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:19,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-01-06 22:58:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2021-01-06 22:58:19,411 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 15 [2021-01-06 22:58:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:19,413 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2021-01-06 22:58:19,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2021-01-06 22:58:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:19,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:19,414 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:19,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 22:58:19,628 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1014534325, now seen corresponding path program 20 times [2021-01-06 22:58:19,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494295264] [2021-01-06 22:58:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494295264] [2021-01-06 22:58:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369120953] [2021-01-06 22:58:19,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:19,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:19,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:19,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:19,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33646336] [2021-01-06 22:58:19,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:19,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:19,866 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 12 states. [2021-01-06 22:58:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:20,188 INFO L93 Difference]: Finished difference Result 94 states and 224 transitions. [2021-01-06 22:58:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:20,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:58:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:20,190 INFO L225 Difference]: With dead ends: 94 [2021-01-06 22:58:20,190 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:58:20,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:58:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-01-06 22:58:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2021-01-06 22:58:20,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 15 [2021-01-06 22:58:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:20,194 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2021-01-06 22:58:20,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2021-01-06 22:58:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:20,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:20,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:20,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:20,410 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash -946576148, now seen corresponding path program 21 times [2021-01-06 22:58:20,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:20,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876436115] [2021-01-06 22:58:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876436115] [2021-01-06 22:58:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621050207] [2021-01-06 22:58:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:20,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:20,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:20,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240461383] [2021-01-06 22:58:20,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:20,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:20,678 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 13 states. [2021-01-06 22:58:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:20,884 INFO L93 Difference]: Finished difference Result 76 states and 179 transitions. [2021-01-06 22:58:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:58:20,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 22:58:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:20,886 INFO L225 Difference]: With dead ends: 76 [2021-01-06 22:58:20,886 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 22:58:20,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:58:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 22:58:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-01-06 22:58:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:20,890 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:20,890 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:20,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:20,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:20,891 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:21,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 22:58:21,100 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1192145786, now seen corresponding path program 22 times [2021-01-06 22:58:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:21,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290159451] [2021-01-06 22:58:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290159451] [2021-01-06 22:58:21,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135140274] [2021-01-06 22:58:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:21,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:21,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:21,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:21,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590296976] [2021-01-06 22:58:21,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:21,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:21,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:21,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:21,347 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:21,548 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2021-01-06 22:58:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:21,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:21,549 INFO L225 Difference]: With dead ends: 101 [2021-01-06 22:58:21,549 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 22:58:21,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 22:58:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-01-06 22:58:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:21,554 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:21,554 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:21,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:21,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:21,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:21,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 22:58:21,761 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash 63919090, now seen corresponding path program 23 times [2021-01-06 22:58:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:21,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672052638] [2021-01-06 22:58:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672052638] [2021-01-06 22:58:21,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011397772] [2021-01-06 22:58:21,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:21,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:58:21,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:21,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:21,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644138184] [2021-01-06 22:58:21,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:21,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:21,987 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:22,196 INFO L93 Difference]: Finished difference Result 94 states and 215 transitions. [2021-01-06 22:58:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:22,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:22,198 INFO L225 Difference]: With dead ends: 94 [2021-01-06 22:58:22,198 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 22:58:22,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:58:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 22:58:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-01-06 22:58:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:22,202 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:22,203 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:22,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:22,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:22,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:22,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 22:58:22,416 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash -22171030, now seen corresponding path program 24 times [2021-01-06 22:58:22,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:22,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450886343] [2021-01-06 22:58:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450886343] [2021-01-06 22:58:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348841654] [2021-01-06 22:58:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:22,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:58:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:22,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:22,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760099191] [2021-01-06 22:58:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:22,645 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:22,927 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2021-01-06 22:58:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:22,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:22,929 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:22,929 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 22:58:22,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 22:58:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-01-06 22:58:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:22,934 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:22,934 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:22,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:22,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:22,935 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:23,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 22:58:23,149 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash 111894, now seen corresponding path program 25 times [2021-01-06 22:58:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:23,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194854252] [2021-01-06 22:58:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:23,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194854252] [2021-01-06 22:58:23,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316719338] [2021-01-06 22:58:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:23,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:23,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:23,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:23,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234691645] [2021-01-06 22:58:23,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:23,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:23,332 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:23,634 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2021-01-06 22:58:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:23,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:23,636 INFO L225 Difference]: With dead ends: 85 [2021-01-06 22:58:23,636 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 22:58:23,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 22:58:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-01-06 22:58:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2021-01-06 22:58:23,640 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 16 [2021-01-06 22:58:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:23,640 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2021-01-06 22:58:23,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2021-01-06 22:58:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:23,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:23,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:23,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 22:58:23,842 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash 85730, now seen corresponding path program 26 times [2021-01-06 22:58:23,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:23,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232361423] [2021-01-06 22:58:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:23,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232361423] [2021-01-06 22:58:23,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130287444] [2021-01-06 22:58:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:24,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:24,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:24,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:24,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543774555] [2021-01-06 22:58:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:24,055 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 12 states. [2021-01-06 22:58:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:24,382 INFO L93 Difference]: Finished difference Result 110 states and 257 transitions. [2021-01-06 22:58:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:24,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:24,384 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:58:24,384 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:24,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-01-06 22:58:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2021-01-06 22:58:24,389 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 16 [2021-01-06 22:58:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2021-01-06 22:58:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2021-01-06 22:58:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:24,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:24,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:24,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:24,605 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 108050, now seen corresponding path program 27 times [2021-01-06 22:58:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:24,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125941782] [2021-01-06 22:58:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125941782] [2021-01-06 22:58:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316620393] [2021-01-06 22:58:24,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:24,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:24,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:24,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130926542] [2021-01-06 22:58:24,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:24,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:24,797 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 13 states. [2021-01-06 22:58:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:25,291 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2021-01-06 22:58:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:25,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 22:58:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:25,293 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:25,293 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 22:58:25,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 22:58:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-01-06 22:58:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-01-06 22:58:25,297 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 16 [2021-01-06 22:58:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:25,297 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-01-06 22:58:25,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-01-06 22:58:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:25,298 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:25,298 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:25,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 22:58:25,512 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 28 times [2021-01-06 22:58:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:25,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56301251] [2021-01-06 22:58:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56301251] [2021-01-06 22:58:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034144580] [2021-01-06 22:58:25,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:25,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:25,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:25,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:25,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625108884] [2021-01-06 22:58:25,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:25,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:25,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:25,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:25,784 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2021-01-06 22:58:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:26,054 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2021-01-06 22:58:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:26,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:26,056 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:26,056 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:26,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-01-06 22:58:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:26,059 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2021-01-06 22:58:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:26,059 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:26,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:26,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:26,060 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:26,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:26,274 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 29 times [2021-01-06 22:58:26,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:26,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344701775] [2021-01-06 22:58:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344701775] [2021-01-06 22:58:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138984444] [2021-01-06 22:58:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:26,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:58:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:26,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:26,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:26,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164545959] [2021-01-06 22:58:26,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:26,502 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2021-01-06 22:58:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:26,837 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2021-01-06 22:58:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:26,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:26,839 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:26,839 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:26,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-01-06 22:58:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2021-01-06 22:58:26,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2021-01-06 22:58:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:26,844 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2021-01-06 22:58:26,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2021-01-06 22:58:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:26,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:26,845 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:27,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 22:58:27,058 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 30 times [2021-01-06 22:58:27,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:27,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119802787] [2021-01-06 22:58:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119802787] [2021-01-06 22:58:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554702788] [2021-01-06 22:58:27,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:27,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 22:58:27,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:27,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:27,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839982657] [2021-01-06 22:58:27,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:27,309 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2021-01-06 22:58:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:27,677 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2021-01-06 22:58:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:27,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:27,680 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:27,680 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 22:58:27,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 22:58:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2021-01-06 22:58:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-01-06 22:58:27,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2021-01-06 22:58:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:27,685 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-01-06 22:58:27,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-01-06 22:58:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:27,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:27,686 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:27,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 22:58:27,902 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 31 times [2021-01-06 22:58:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009225082] [2021-01-06 22:58:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:27,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009225082] [2021-01-06 22:58:27,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921896306] [2021-01-06 22:58:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:28,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:28,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595015102] [2021-01-06 22:58:28,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:28,110 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2021-01-06 22:58:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:28,536 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2021-01-06 22:58:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:28,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:28,538 INFO L225 Difference]: With dead ends: 105 [2021-01-06 22:58:28,538 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 22:58:28,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 22:58:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2021-01-06 22:58:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2021-01-06 22:58:28,543 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2021-01-06 22:58:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:28,543 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2021-01-06 22:58:28,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2021-01-06 22:58:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:28,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:28,544 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:28,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 22:58:28,756 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 32 times [2021-01-06 22:58:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:28,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259283560] [2021-01-06 22:58:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259283560] [2021-01-06 22:58:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125433623] [2021-01-06 22:58:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:28,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:28,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:28,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:28,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250689681] [2021-01-06 22:58:28,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:28,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:28,989 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2021-01-06 22:58:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:29,545 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2021-01-06 22:58:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:29,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:29,547 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:29,547 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:29,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-01-06 22:58:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:58:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2021-01-06 22:58:29,551 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2021-01-06 22:58:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:29,551 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2021-01-06 22:58:29,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2021-01-06 22:58:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:29,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:29,552 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:29,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 22:58:29,766 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 33 times [2021-01-06 22:58:29,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:29,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967436247] [2021-01-06 22:58:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:29,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967436247] [2021-01-06 22:58:29,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417746753] [2021-01-06 22:58:29,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:29,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 22:58:29,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:29,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:30,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:30,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 22:58:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112312599] [2021-01-06 22:58:30,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:30,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:30,067 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 16 states. [2021-01-06 22:58:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:30,372 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2021-01-06 22:58:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:58:30,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 22:58:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:30,376 INFO L225 Difference]: With dead ends: 69 [2021-01-06 22:58:30,376 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 22:58:30,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 22:58:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-01-06 22:58:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2021-01-06 22:58:30,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2021-01-06 22:58:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:30,380 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2021-01-06 22:58:30,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2021-01-06 22:58:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:30,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:30,380 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:30,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 22:58:30,585 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1104152418, now seen corresponding path program 34 times [2021-01-06 22:58:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69868882] [2021-01-06 22:58:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69868882] [2021-01-06 22:58:30,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992428618] [2021-01-06 22:58:30,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:30,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:30,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:30,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:30,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:30,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011278442] [2021-01-06 22:58:30,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:30,824 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2021-01-06 22:58:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:31,031 INFO L93 Difference]: Finished difference Result 102 states and 229 transitions. [2021-01-06 22:58:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:31,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:31,033 INFO L225 Difference]: With dead ends: 102 [2021-01-06 22:58:31,034 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 22:58:31,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 22:58:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2021-01-06 22:58:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2021-01-06 22:58:31,038 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 18 [2021-01-06 22:58:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:31,038 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2021-01-06 22:58:31,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2021-01-06 22:58:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:31,038 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:31,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:31,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:31,239 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1296718614, now seen corresponding path program 35 times [2021-01-06 22:58:31,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:31,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830989705] [2021-01-06 22:58:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830989705] [2021-01-06 22:58:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975910246] [2021-01-06 22:58:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:31,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:58:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:31,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:31,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037670828] [2021-01-06 22:58:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:31,461 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 15 states. [2021-01-06 22:58:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:31,722 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2021-01-06 22:58:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:31,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:31,727 INFO L225 Difference]: With dead ends: 97 [2021-01-06 22:58:31,727 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 22:58:31,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 22:58:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-01-06 22:58:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 22:58:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2021-01-06 22:58:31,738 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 18 [2021-01-06 22:58:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:31,738 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2021-01-06 22:58:31,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2021-01-06 22:58:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:31,738 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:31,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:31,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 22:58:31,939 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash 168491918, now seen corresponding path program 36 times [2021-01-06 22:58:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:31,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468840982] [2021-01-06 22:58:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468840982] [2021-01-06 22:58:32,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275007155] [2021-01-06 22:58:32,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:32,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 22:58:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:32,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453900840] [2021-01-06 22:58:32,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:32,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:32,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:32,167 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 15 states. [2021-01-06 22:58:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:32,481 INFO L93 Difference]: Finished difference Result 95 states and 219 transitions. [2021-01-06 22:58:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:32,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:32,485 INFO L225 Difference]: With dead ends: 95 [2021-01-06 22:58:32,485 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 22:58:32,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:58:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 22:58:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2021-01-06 22:58:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 22:58:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2021-01-06 22:58:32,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 18 [2021-01-06 22:58:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:32,490 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2021-01-06 22:58:32,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:32,490 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2021-01-06 22:58:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:32,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:32,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:32,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 22:58:32,704 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 82401798, now seen corresponding path program 37 times [2021-01-06 22:58:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:32,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286295272] [2021-01-06 22:58:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286295272] [2021-01-06 22:58:32,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488984887] [2021-01-06 22:58:32,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:32,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:32,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435385977] [2021-01-06 22:58:32,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:32,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:32,941 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 15 states. [2021-01-06 22:58:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:33,284 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2021-01-06 22:58:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:33,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:33,286 INFO L225 Difference]: With dead ends: 93 [2021-01-06 22:58:33,286 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 22:58:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:58:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 22:58:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-01-06 22:58:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2021-01-06 22:58:33,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2021-01-06 22:58:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:33,290 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2021-01-06 22:58:33,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2021-01-06 22:58:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:33,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:33,291 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:33,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:33,505 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 104658558, now seen corresponding path program 38 times [2021-01-06 22:58:33,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:33,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33083745] [2021-01-06 22:58:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:33,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33083745] [2021-01-06 22:58:33,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221716004] [2021-01-06 22:58:33,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:33,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:33,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016119755] [2021-01-06 22:58:33,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:33,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:33,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:33,741 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2021-01-06 22:58:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:34,155 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2021-01-06 22:58:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:34,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:34,157 INFO L225 Difference]: With dead ends: 111 [2021-01-06 22:58:34,157 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:58:34,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:58:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2021-01-06 22:58:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 177 transitions. [2021-01-06 22:58:34,163 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 177 transitions. Word has length 18 [2021-01-06 22:58:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:34,163 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 177 transitions. [2021-01-06 22:58:34,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 177 transitions. [2021-01-06 22:58:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:34,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:34,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:34,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 22:58:34,379 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash 104680878, now seen corresponding path program 39 times [2021-01-06 22:58:34,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:34,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010452604] [2021-01-06 22:58:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010452604] [2021-01-06 22:58:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540757897] [2021-01-06 22:58:34,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:34,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 22:58:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:34,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 22:58:34,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490770903] [2021-01-06 22:58:34,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:34,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:34,645 INFO L87 Difference]: Start difference. First operand 69 states and 177 transitions. Second operand 16 states. [2021-01-06 22:58:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:35,270 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2021-01-06 22:58:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:35,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 22:58:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:35,272 INFO L225 Difference]: With dead ends: 109 [2021-01-06 22:58:35,272 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 22:58:35,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 22:58:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-01-06 22:58:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:35,276 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 18 [2021-01-06 22:58:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:35,276 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:35,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:35,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:35,277 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:35,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:35,487 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash -584859409, now seen corresponding path program 40 times [2021-01-06 22:58:35,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:35,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408122021] [2021-01-06 22:58:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:35,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408122021] [2021-01-06 22:58:35,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896611223] [2021-01-06 22:58:35,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:35,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:35,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:35,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:35,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:35,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:35,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256626878] [2021-01-06 22:58:35,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:35,750 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:36,043 INFO L93 Difference]: Finished difference Result 100 states and 235 transitions. [2021-01-06 22:58:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:36,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:36,045 INFO L225 Difference]: With dead ends: 100 [2021-01-06 22:58:36,045 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 22:58:36,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 22:58:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-01-06 22:58:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:36,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:36,049 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:36,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:36,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:36,050 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:36,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 22:58:36,255 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1816011623, now seen corresponding path program 41 times [2021-01-06 22:58:36,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:36,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985672559] [2021-01-06 22:58:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:36,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985672559] [2021-01-06 22:58:36,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911594148] [2021-01-06 22:58:36,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:36,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 22:58:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:36,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:36,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:36,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822650316] [2021-01-06 22:58:36,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:36,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:36,485 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:36,847 INFO L93 Difference]: Finished difference Result 107 states and 249 transitions. [2021-01-06 22:58:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:36,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:36,849 INFO L225 Difference]: With dead ends: 107 [2021-01-06 22:58:36,849 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:36,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:58:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2021-01-06 22:58:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:36,854 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:36,854 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:36,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:36,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:36,855 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:37,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 22:58:37,065 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash 687784927, now seen corresponding path program 42 times [2021-01-06 22:58:37,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:37,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121323924] [2021-01-06 22:58:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121323924] [2021-01-06 22:58:37,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404088085] [2021-01-06 22:58:37,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:37,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 22:58:37,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:37,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:37,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:37,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:37,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145977451] [2021-01-06 22:58:37,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:37,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:37,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:37,278 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:37,622 INFO L93 Difference]: Finished difference Result 103 states and 241 transitions. [2021-01-06 22:58:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:37,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:37,624 INFO L225 Difference]: With dead ends: 103 [2021-01-06 22:58:37,624 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 22:58:37,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 22:58:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2021-01-06 22:58:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:37,629 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:37,629 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:37,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:37,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:37,630 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:37,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 22:58:37,839 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash 601694807, now seen corresponding path program 43 times [2021-01-06 22:58:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:37,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272473013] [2021-01-06 22:58:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:37,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272473013] [2021-01-06 22:58:37,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135272564] [2021-01-06 22:58:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:38,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:38,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911877486] [2021-01-06 22:58:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:38,042 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:38,427 INFO L93 Difference]: Finished difference Result 99 states and 233 transitions. [2021-01-06 22:58:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:38,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:38,429 INFO L225 Difference]: With dead ends: 99 [2021-01-06 22:58:38,429 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:38,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2021-01-06 22:58:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:38,433 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:38,433 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:38,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:38,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:38,434 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:38,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 22:58:38,649 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash 623951567, now seen corresponding path program 44 times [2021-01-06 22:58:38,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:38,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128950482] [2021-01-06 22:58:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128950482] [2021-01-06 22:58:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26266846] [2021-01-06 22:58:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:38,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:38,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:38,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:38,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956628518] [2021-01-06 22:58:38,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:38,846 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:39,262 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2021-01-06 22:58:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:39,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:39,263 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:58:39,263 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 22:58:39,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:58:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 22:58:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2021-01-06 22:58:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 22:58:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2021-01-06 22:58:39,267 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 19 [2021-01-06 22:58:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:39,268 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2021-01-06 22:58:39,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2021-01-06 22:58:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:39,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:39,268 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:39,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:39,484 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 623973887, now seen corresponding path program 45 times [2021-01-06 22:58:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:39,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395192944] [2021-01-06 22:58:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:39,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395192944] [2021-01-06 22:58:39,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790431128] [2021-01-06 22:58:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:39,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 22:58:39,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:39,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:39,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:39,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 22:58:39,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340465754] [2021-01-06 22:58:39,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:39,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:39,709 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 16 states. [2021-01-06 22:58:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:40,312 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2021-01-06 22:58:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:40,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2021-01-06 22:58:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:40,314 INFO L225 Difference]: With dead ends: 98 [2021-01-06 22:58:40,314 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 22:58:40,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:58:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 22:58:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2021-01-06 22:58:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2021-01-06 22:58:40,318 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 19 [2021-01-06 22:58:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:40,318 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2021-01-06 22:58:40,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2021-01-06 22:58:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:40,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:40,319 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:40,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 22:58:40,531 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1822436660, now seen corresponding path program 46 times [2021-01-06 22:58:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:40,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592331129] [2021-01-06 22:58:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:40,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592331129] [2021-01-06 22:58:40,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306287559] [2021-01-06 22:58:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:40,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:40,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:40,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 22:58:40,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986129487] [2021-01-06 22:58:40,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:40,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:40,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:40,797 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 17 states. [2021-01-06 22:58:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:41,113 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-01-06 22:58:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:41,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 22:58:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:41,115 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:41,115 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:41,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-01-06 22:58:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:41,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:41,120 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:41,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:41,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:41,120 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:41,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 22:58:41,334 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash -233536318, now seen corresponding path program 47 times [2021-01-06 22:58:41,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:41,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348869403] [2021-01-06 22:58:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348869403] [2021-01-06 22:58:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525279301] [2021-01-06 22:58:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:41,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 22:58:41,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:41,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:41,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:41,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299351571] [2021-01-06 22:58:41,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:41,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:41,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:41,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:41,634 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:41,922 INFO L93 Difference]: Finished difference Result 123 states and 283 transitions. [2021-01-06 22:58:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:41,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:41,924 INFO L225 Difference]: With dead ends: 123 [2021-01-06 22:58:41,924 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 22:58:41,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 22:58:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-01-06 22:58:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:41,928 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:41,928 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:41,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:41,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:41,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:42,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:42,143 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash 606087482, now seen corresponding path program 48 times [2021-01-06 22:58:42,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:42,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339542497] [2021-01-06 22:58:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339542497] [2021-01-06 22:58:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690412651] [2021-01-06 22:58:42,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:42,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 22:58:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:42,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:42,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:42,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377616324] [2021-01-06 22:58:42,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:42,409 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:42,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:42,753 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2021-01-06 22:58:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:42,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:42,755 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:58:42,755 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 22:58:42,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 22:58:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-01-06 22:58:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:42,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:42,760 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:42,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:42,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:42,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:42,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 22:58:42,962 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1288008782, now seen corresponding path program 49 times [2021-01-06 22:58:42,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:42,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606001639] [2021-01-06 22:58:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606001639] [2021-01-06 22:58:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118333247] [2021-01-06 22:58:43,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:43,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368250867] [2021-01-06 22:58:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:43,194 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:43,598 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2021-01-06 22:58:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:43,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:43,600 INFO L225 Difference]: With dead ends: 112 [2021-01-06 22:58:43,600 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 22:58:43,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 22:58:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2021-01-06 22:58:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:43,604 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:43,604 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:43,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:43,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:43,605 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:43,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:43,819 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1878731818, now seen corresponding path program 50 times [2021-01-06 22:58:43,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:43,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095013119] [2021-01-06 22:58:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:43,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095013119] [2021-01-06 22:58:43,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348584561] [2021-01-06 22:58:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:44,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:44,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:44,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:44,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:44,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:44,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803623983] [2021-01-06 22:58:44,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:44,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:44,048 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:44,418 INFO L93 Difference]: Finished difference Result 108 states and 253 transitions. [2021-01-06 22:58:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:44,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:44,420 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:58:44,420 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 22:58:44,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:58:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 22:58:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2021-01-06 22:58:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:44,423 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:44,423 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:44,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:44,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:44,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:44,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 22:58:44,633 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:44,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1792641698, now seen corresponding path program 51 times [2021-01-06 22:58:44,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:44,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088845779] [2021-01-06 22:58:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:44,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088845779] [2021-01-06 22:58:44,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778529131] [2021-01-06 22:58:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:44,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 22:58:44,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:44,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:44,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326095424] [2021-01-06 22:58:44,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:44,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:44,842 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:45,313 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2021-01-06 22:58:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:45,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:45,315 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:58:45,315 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:58:45,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:58:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:58:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-01-06 22:58:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:45,317 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:45,317 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:45,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:45,318 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:45,318 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:45,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:45,519 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1814924622, now seen corresponding path program 52 times [2021-01-06 22:58:45,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:45,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049967307] [2021-01-06 22:58:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:45,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049967307] [2021-01-06 22:58:45,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687388890] [2021-01-06 22:58:45,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:45,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:45,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:45,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:45,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 22:58:45,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432317034] [2021-01-06 22:58:45,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:45,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:45,770 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 17 states. [2021-01-06 22:58:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:46,342 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2021-01-06 22:58:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:58:46,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 22:58:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:46,344 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:58:46,344 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 22:58:46,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 22:58:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2021-01-06 22:58:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:58:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2021-01-06 22:58:46,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 20 [2021-01-06 22:58:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2021-01-06 22:58:46,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2021-01-06 22:58:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:46,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:46,349 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:46,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 22:58:46,563 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 427277707, now seen corresponding path program 53 times [2021-01-06 22:58:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920449949] [2021-01-06 22:58:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920449949] [2021-01-06 22:58:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371671376] [2021-01-06 22:58:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:46,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 22:58:46,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:46,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 22:58:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16192186] [2021-01-06 22:58:46,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:46,790 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 17 states. [2021-01-06 22:58:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:47,273 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2021-01-06 22:58:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:47,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:47,275 INFO L225 Difference]: With dead ends: 126 [2021-01-06 22:58:47,275 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 22:58:47,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=1073, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:58:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 22:58:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2021-01-06 22:58:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 22:58:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2021-01-06 22:58:47,279 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 21 [2021-01-06 22:58:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:47,279 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2021-01-06 22:58:47,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2021-01-06 22:58:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:47,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:47,280 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:47,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 22:58:47,493 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 427995791, now seen corresponding path program 54 times [2021-01-06 22:58:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:47,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928825677] [2021-01-06 22:58:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928825677] [2021-01-06 22:58:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623810275] [2021-01-06 22:58:47,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:47,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:47,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:47,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:47,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568692028] [2021-01-06 22:58:47,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:47,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:47,754 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 18 states. [2021-01-06 22:58:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:48,467 INFO L93 Difference]: Finished difference Result 106 states and 256 transitions. [2021-01-06 22:58:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:58:48,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:48,469 INFO L225 Difference]: With dead ends: 106 [2021-01-06 22:58:48,469 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:48,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:58:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2021-01-06 22:58:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 22:58:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-01-06 22:58:48,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2021-01-06 22:58:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:48,473 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-01-06 22:58:48,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-01-06 22:58:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:48,473 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:48,474 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:48,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 22:58:48,688 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 590838995, now seen corresponding path program 55 times [2021-01-06 22:58:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:48,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934199442] [2021-01-06 22:58:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934199442] [2021-01-06 22:58:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297161763] [2021-01-06 22:58:48,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:48,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749103451] [2021-01-06 22:58:48,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:48,993 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2021-01-06 22:58:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:49,365 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2021-01-06 22:58:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:49,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:49,366 INFO L225 Difference]: With dead ends: 99 [2021-01-06 22:58:49,366 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:49,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2021-01-06 22:58:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2021-01-06 22:58:49,369 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2021-01-06 22:58:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:49,369 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2021-01-06 22:58:49,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2021-01-06 22:58:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:49,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:49,370 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:49,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 22:58:49,585 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1430462795, now seen corresponding path program 56 times [2021-01-06 22:58:49,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:49,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459248231] [2021-01-06 22:58:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459248231] [2021-01-06 22:58:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814923296] [2021-01-06 22:58:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:49,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:49,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:49,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:49,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:49,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089844966] [2021-01-06 22:58:49,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:49,850 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2021-01-06 22:58:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:50,235 INFO L93 Difference]: Finished difference Result 110 states and 251 transitions. [2021-01-06 22:58:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:50,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:50,237 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:58:50,238 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 22:58:50,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=963, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:58:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 22:58:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2021-01-06 22:58:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 22:58:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2021-01-06 22:58:50,240 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2021-01-06 22:58:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:50,240 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2021-01-06 22:58:50,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2021-01-06 22:58:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:50,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:50,241 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:50,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 22:58:50,453 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash -463633469, now seen corresponding path program 57 times [2021-01-06 22:58:50,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:50,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043780159] [2021-01-06 22:58:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043780159] [2021-01-06 22:58:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523368512] [2021-01-06 22:58:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:50,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:58:50,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:50,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:50,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691161167] [2021-01-06 22:58:50,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:50,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:50,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:50,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:50,719 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2021-01-06 22:58:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:51,177 INFO L93 Difference]: Finished difference Result 108 states and 249 transitions. [2021-01-06 22:58:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:51,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:51,179 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:58:51,179 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 22:58:51,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 22:58:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-01-06 22:58:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 22:58:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2021-01-06 22:58:51,182 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2021-01-06 22:58:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:51,182 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2021-01-06 22:58:51,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2021-01-06 22:58:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:51,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:51,183 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:51,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-01-06 22:58:51,384 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1591860165, now seen corresponding path program 58 times [2021-01-06 22:58:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:51,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484319630] [2021-01-06 22:58:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484319630] [2021-01-06 22:58:51,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064380306] [2021-01-06 22:58:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:51,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:51,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:51,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:51,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:51,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197084723] [2021-01-06 22:58:51,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:51,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:51,614 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2021-01-06 22:58:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:52,120 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2021-01-06 22:58:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:52,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:52,122 INFO L225 Difference]: With dead ends: 106 [2021-01-06 22:58:52,122 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 22:58:52,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:58:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 22:58:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2021-01-06 22:58:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2021-01-06 22:58:52,126 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2021-01-06 22:58:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:52,126 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2021-01-06 22:58:52,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2021-01-06 22:58:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:52,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:52,127 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:52,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:52,341 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1677950285, now seen corresponding path program 59 times [2021-01-06 22:58:52,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:52,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532566972] [2021-01-06 22:58:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532566972] [2021-01-06 22:58:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344604277] [2021-01-06 22:58:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:52,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 22:58:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:52,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:52,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022922658] [2021-01-06 22:58:52,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:52,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:52,574 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2021-01-06 22:58:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:53,116 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2021-01-06 22:58:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:58:53,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:53,117 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:58:53,117 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:58:53,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=1266, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:58:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:58:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2021-01-06 22:58:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 22:58:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2021-01-06 22:58:53,121 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2021-01-06 22:58:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:53,121 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2021-01-06 22:58:53,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2021-01-06 22:58:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:53,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:53,122 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:53,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:53,323 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1655693525, now seen corresponding path program 60 times [2021-01-06 22:58:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155890623] [2021-01-06 22:58:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:53,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155890623] [2021-01-06 22:58:53,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178904634] [2021-01-06 22:58:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:53,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:53,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:53,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:53,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:53,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326935178] [2021-01-06 22:58:53,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:53,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:53,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:53,559 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2021-01-06 22:58:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:54,103 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2021-01-06 22:58:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:54,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:54,105 INFO L225 Difference]: With dead ends: 121 [2021-01-06 22:58:54,105 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 22:58:54,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=629, Invalid=1351, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:58:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 22:58:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2021-01-06 22:58:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:58:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-01-06 22:58:54,110 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2021-01-06 22:58:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:54,111 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-01-06 22:58:54,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-01-06 22:58:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:54,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:54,112 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:54,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:54,321 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1655671205, now seen corresponding path program 61 times [2021-01-06 22:58:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:54,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41831153] [2021-01-06 22:58:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:54,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41831153] [2021-01-06 22:58:54,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990236293] [2021-01-06 22:58:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:54,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:54,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 22:58:54,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506900553] [2021-01-06 22:58:54,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:54,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:54,561 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2021-01-06 22:58:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:55,306 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2021-01-06 22:58:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:55,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2021-01-06 22:58:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:55,307 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:58:55,308 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:55,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=640, Invalid=1430, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:58:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2021-01-06 22:58:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2021-01-06 22:58:55,310 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2021-01-06 22:58:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:55,310 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2021-01-06 22:58:55,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2021-01-06 22:58:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:55,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:55,311 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:55,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:55,512 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -985011240, now seen corresponding path program 62 times [2021-01-06 22:58:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:55,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881374224] [2021-01-06 22:58:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:55,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881374224] [2021-01-06 22:58:55,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440716045] [2021-01-06 22:58:55,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:55,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:55,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:55,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:55,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 22:58:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577657262] [2021-01-06 22:58:55,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:55,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:55,844 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 20 states. [2021-01-06 22:58:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:56,231 INFO L93 Difference]: Finished difference Result 81 states and 187 transitions. [2021-01-06 22:58:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:58:56,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2021-01-06 22:58:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:56,232 INFO L225 Difference]: With dead ends: 81 [2021-01-06 22:58:56,232 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 22:58:56,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=864, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 22:58:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2021-01-06 22:58:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 22:58:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2021-01-06 22:58:56,236 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2021-01-06 22:58:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:56,236 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2021-01-06 22:58:56,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2021-01-06 22:58:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:56,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:56,237 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:56,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 22:58:56,452 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1090086938, now seen corresponding path program 63 times [2021-01-06 22:58:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:56,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777016862] [2021-01-06 22:58:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:56,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777016862] [2021-01-06 22:58:56,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186871451] [2021-01-06 22:58:56,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:56,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:58:56,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:58:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:56,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:56,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061425779] [2021-01-06 22:58:56,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:56,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:56,791 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2021-01-06 22:58:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:57,129 INFO L93 Difference]: Finished difference Result 122 states and 273 transitions. [2021-01-06 22:58:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:57,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:57,131 INFO L225 Difference]: With dead ends: 122 [2021-01-06 22:58:57,131 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 22:58:57,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 22:58:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 66. [2021-01-06 22:58:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:58:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2021-01-06 22:58:57,135 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 22 [2021-01-06 22:58:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:57,135 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2021-01-06 22:58:57,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2021-01-06 22:58:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:57,135 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:57,135 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:57,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:57,336 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:57,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1665466786, now seen corresponding path program 64 times [2021-01-06 22:58:57,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:57,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979159437] [2021-01-06 22:58:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979159437] [2021-01-06 22:58:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988187956] [2021-01-06 22:58:57,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:57,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:57,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:57,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:57,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:57,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:57,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298537434] [2021-01-06 22:58:57,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:57,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:57,621 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 19 states. [2021-01-06 22:58:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:58,000 INFO L93 Difference]: Finished difference Result 117 states and 265 transitions. [2021-01-06 22:58:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:58,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:58,002 INFO L225 Difference]: With dead ends: 117 [2021-01-06 22:58:58,002 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 22:58:58,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:58,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 22:58:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2021-01-06 22:58:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2021-01-06 22:58:58,006 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 22 [2021-01-06 22:58:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:58,006 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2021-01-06 22:58:58,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2021-01-06 22:58:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:58,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:58,007 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:58,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 22:58:58,214 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash -825842986, now seen corresponding path program 65 times [2021-01-06 22:58:58,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:58,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298777453] [2021-01-06 22:58:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:58,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298777453] [2021-01-06 22:58:58,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225447890] [2021-01-06 22:58:58,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:58,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 22:58:58,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:58,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:58,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:58,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51208137] [2021-01-06 22:58:58,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:58,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:58,494 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 19 states. [2021-01-06 22:58:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:58,927 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2021-01-06 22:58:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:58,928 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:58,929 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:58:58,929 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 22:58:58,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:58:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 22:58:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2021-01-06 22:58:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 22:58:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2021-01-06 22:58:58,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 22 [2021-01-06 22:58:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:58,931 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2021-01-06 22:58:58,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2021-01-06 22:58:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:58,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:58,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:59,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:59,133 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1575028046, now seen corresponding path program 66 times [2021-01-06 22:58:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:59,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633344887] [2021-01-06 22:58:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:59,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633344887] [2021-01-06 22:58:59,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353136905] [2021-01-06 22:58:59,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:59,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:59,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:59,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254541980] [2021-01-06 22:58:59,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:59,420 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 19 states. [2021-01-06 22:58:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:59,848 INFO L93 Difference]: Finished difference Result 113 states and 261 transitions. [2021-01-06 22:58:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:59,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:59,850 INFO L225 Difference]: With dead ends: 113 [2021-01-06 22:58:59,850 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 22:58:59,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=422, Invalid=1138, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:58:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 22:58:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2021-01-06 22:58:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 22:58:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2021-01-06 22:58:59,854 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 22 [2021-01-06 22:58:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:59,854 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2021-01-06 22:58:59,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2021-01-06 22:58:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:59,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:59,855 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:00,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 22:59:00,063 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:00,064 INFO L82 PathProgramCache]: Analyzing trace with hash 446801350, now seen corresponding path program 67 times [2021-01-06 22:59:00,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:00,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819148351] [2021-01-06 22:59:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:00,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819148351] [2021-01-06 22:59:00,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279455140] [2021-01-06 22:59:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:00,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:59:00,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:00,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:00,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:59:00,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436598497] [2021-01-06 22:59:00,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:59:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:59:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:59:00,334 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 19 states. [2021-01-06 22:59:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:00,897 INFO L93 Difference]: Finished difference Result 111 states and 259 transitions. [2021-01-06 22:59:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:00,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:59:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:00,899 INFO L225 Difference]: With dead ends: 111 [2021-01-06 22:59:00,899 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:59:00,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:59:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:59:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2021-01-06 22:59:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 22:59:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-01-06 22:59:00,903 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 22 [2021-01-06 22:59:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:00,903 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-01-06 22:59:00,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:59:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-01-06 22:59:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:59:00,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:00,904 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:01,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:01,107 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 360711230, now seen corresponding path program 68 times [2021-01-06 22:59:01,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:01,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894031789] [2021-01-06 22:59:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:01,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894031789] [2021-01-06 22:59:01,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618484999] [2021-01-06 22:59:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:01,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:59:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:01,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:01,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:59:01,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068569569] [2021-01-06 22:59:01,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:59:01,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:59:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:59:01,379 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 19 states. [2021-01-06 22:59:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:01,989 INFO L93 Difference]: Finished difference Result 109 states and 257 transitions. [2021-01-06 22:59:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:01,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:59:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:01,990 INFO L225 Difference]: With dead ends: 109 [2021-01-06 22:59:01,990 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 22:59:01,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 22:59:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2021-01-06 22:59:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:59:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2021-01-06 22:59:01,994 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2021-01-06 22:59:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:01,994 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2021-01-06 22:59:01,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:59:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2021-01-06 22:59:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:59:01,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:01,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:02,195 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 382967990, now seen corresponding path program 69 times [2021-01-06 22:59:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303305169] [2021-01-06 22:59:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303305169] [2021-01-06 22:59:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427029964] [2021-01-06 22:59:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:02,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:59:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:02,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:02,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:59:02,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834036255] [2021-01-06 22:59:02,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:59:02,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:02,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:59:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:59:02,458 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2021-01-06 22:59:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:03,098 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2021-01-06 22:59:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:03,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:59:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:03,099 INFO L225 Difference]: With dead ends: 127 [2021-01-06 22:59:03,099 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 22:59:03,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=644, Invalid=1426, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:59:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 22:59:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2021-01-06 22:59:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 22:59:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 209 transitions. [2021-01-06 22:59:03,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 209 transitions. Word has length 22 [2021-01-06 22:59:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:03,103 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 209 transitions. [2021-01-06 22:59:03,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:59:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 209 transitions. [2021-01-06 22:59:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:59:03,104 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:03,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-01-06 22:59:03,311 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 382990310, now seen corresponding path program 70 times [2021-01-06 22:59:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596851041] [2021-01-06 22:59:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:03,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596851041] [2021-01-06 22:59:03,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446721802] [2021-01-06 22:59:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:03,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:03,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:03,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:59:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:03,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:03,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 22:59:03,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608067380] [2021-01-06 22:59:03,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:03,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:03,595 INFO L87 Difference]: Start difference. First operand 81 states and 209 transitions. Second operand 20 states. [2021-01-06 22:59:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:04,501 INFO L93 Difference]: Finished difference Result 125 states and 299 transitions. [2021-01-06 22:59:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:04,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2021-01-06 22:59:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:04,505 INFO L225 Difference]: With dead ends: 125 [2021-01-06 22:59:04,505 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 22:59:04,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 22:59:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 22:59:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2021-01-06 22:59:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:04,508 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 22 [2021-01-06 22:59:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:04,508 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:04,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:04,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:04,509 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:04,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:04,712 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 860606391, now seen corresponding path program 71 times [2021-01-06 22:59:04,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:04,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249342404] [2021-01-06 22:59:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249342404] [2021-01-06 22:59:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95105311] [2021-01-06 22:59:04,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:04,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:59:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394255852] [2021-01-06 22:59:05,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:05,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:05,051 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:05,495 INFO L93 Difference]: Finished difference Result 120 states and 283 transitions. [2021-01-06 22:59:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:59:05,496 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:05,497 INFO L225 Difference]: With dead ends: 120 [2021-01-06 22:59:05,497 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 22:59:05,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:59:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 22:59:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 80. [2021-01-06 22:59:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:05,501 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:05,501 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:05,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:05,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:05,501 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:05,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:05,702 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 285226543, now seen corresponding path program 72 times [2021-01-06 22:59:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450908900] [2021-01-06 22:59:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450908900] [2021-01-06 22:59:05,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885502565] [2021-01-06 22:59:05,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:05,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:59:05,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:06,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:06,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:06,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532700085] [2021-01-06 22:59:06,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:06,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:06,033 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:06,498 INFO L93 Difference]: Finished difference Result 131 states and 305 transitions. [2021-01-06 22:59:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:06,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:06,500 INFO L225 Difference]: With dead ends: 131 [2021-01-06 22:59:06,500 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 22:59:06,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:59:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 22:59:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-01-06 22:59:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:06,504 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:06,504 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:06,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:06,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:06,505 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:06,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 22:59:06,715 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1124850343, now seen corresponding path program 73 times [2021-01-06 22:59:06,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:06,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15401045] [2021-01-06 22:59:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:06,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15401045] [2021-01-06 22:59:06,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439259761] [2021-01-06 22:59:06,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:06,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:07,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:07,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:07,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651546639] [2021-01-06 22:59:07,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:07,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:07,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:07,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:07,013 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:07,563 INFO L93 Difference]: Finished difference Result 127 states and 297 transitions. [2021-01-06 22:59:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:07,564 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:07,565 INFO L225 Difference]: With dead ends: 127 [2021-01-06 22:59:07,565 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 22:59:07,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1315, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:59:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 22:59:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 80. [2021-01-06 22:59:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:07,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:07,569 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:07,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:07,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:07,570 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:07,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:07,777 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash -769245921, now seen corresponding path program 74 times [2021-01-06 22:59:07,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:07,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887012587] [2021-01-06 22:59:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:07,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887012587] [2021-01-06 22:59:07,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484250346] [2021-01-06 22:59:07,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:08,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:08,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:08,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426956698] [2021-01-06 22:59:08,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:08,080 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:08,656 INFO L93 Difference]: Finished difference Result 123 states and 289 transitions. [2021-01-06 22:59:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:08,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:08,657 INFO L225 Difference]: With dead ends: 123 [2021-01-06 22:59:08,658 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 22:59:08,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1434, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:59:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 22:59:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-01-06 22:59:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:08,660 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:08,660 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:08,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:08,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:08,660 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:08,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 22:59:08,861 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:08,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1897472617, now seen corresponding path program 75 times [2021-01-06 22:59:08,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:08,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546148343] [2021-01-06 22:59:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:09,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546148343] [2021-01-06 22:59:09,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983039276] [2021-01-06 22:59:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:09,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:59:09,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 22:59:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:09,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:09,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:09,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088478962] [2021-01-06 22:59:09,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:09,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:09,154 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:09,733 INFO L93 Difference]: Finished difference Result 119 states and 281 transitions. [2021-01-06 22:59:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:09,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:09,735 INFO L225 Difference]: With dead ends: 119 [2021-01-06 22:59:09,735 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:59:09,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:59:09,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:59:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-01-06 22:59:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:09,738 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:09,739 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:09,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:09,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:09,739 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:09,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 22:59:09,949 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1983562737, now seen corresponding path program 76 times [2021-01-06 22:59:09,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:09,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320437028] [2021-01-06 22:59:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:10,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320437028] [2021-01-06 22:59:10,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869788631] [2021-01-06 22:59:10,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:10,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:10,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:10,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873308188] [2021-01-06 22:59:10,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:10,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:10,238 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:10,923 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2021-01-06 22:59:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:10,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:10,926 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:59:10,926 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 22:59:10,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=704, Invalid=1648, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:59:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 22:59:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-01-06 22:59:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-01-06 22:59:10,929 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2021-01-06 22:59:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:10,930 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-01-06 22:59:10,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-01-06 22:59:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:10,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:10,930 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:11,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 22:59:11,131 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1961305977, now seen corresponding path program 77 times [2021-01-06 22:59:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:11,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882792721] [2021-01-06 22:59:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:11,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882792721] [2021-01-06 22:59:11,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868134074] [2021-01-06 22:59:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:11,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:59:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:11,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:11,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:11,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259733280] [2021-01-06 22:59:11,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:11,411 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2021-01-06 22:59:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:12,145 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2021-01-06 22:59:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:12,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:12,147 INFO L225 Difference]: With dead ends: 131 [2021-01-06 22:59:12,147 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 22:59:12,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 22:59:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 22:59:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2021-01-06 22:59:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 22:59:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2021-01-06 22:59:12,151 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 23 [2021-01-06 22:59:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:12,152 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2021-01-06 22:59:12,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2021-01-06 22:59:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:12,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:12,152 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:12,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:12,361 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283657, now seen corresponding path program 78 times [2021-01-06 22:59:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:12,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035978323] [2021-01-06 22:59:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:12,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035978323] [2021-01-06 22:59:12,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156699868] [2021-01-06 22:59:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:12,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:59:12,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:12,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:12,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 22:59:12,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380931560] [2021-01-06 22:59:12,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:12,654 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2021-01-06 22:59:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:13,633 INFO L93 Difference]: Finished difference Result 126 states and 302 transitions. [2021-01-06 22:59:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:13,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 22:59:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:13,635 INFO L225 Difference]: With dead ends: 126 [2021-01-06 22:59:13,635 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:59:13,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=859, Invalid=2003, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 22:59:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:59:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 64. [2021-01-06 22:59:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:59:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 155 transitions. [2021-01-06 22:59:13,637 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 155 transitions. Word has length 23 [2021-01-06 22:59:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:13,637 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 155 transitions. [2021-01-06 22:59:13,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 155 transitions. [2021-01-06 22:59:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:13,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:13,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:13,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:13,839 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1702981252, now seen corresponding path program 79 times [2021-01-06 22:59:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:13,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414636272] [2021-01-06 22:59:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:14,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414636272] [2021-01-06 22:59:14,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027832783] [2021-01-06 22:59:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:14,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:14,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 22:59:14,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263392501] [2021-01-06 22:59:14,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:14,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:14,225 INFO L87 Difference]: Start difference. First operand 64 states and 155 transitions. Second operand 22 states. [2021-01-06 22:59:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:14,686 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2021-01-06 22:59:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:59:14,687 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 22:59:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:14,688 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:59:14,688 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:59:14,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1071, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:59:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:59:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-01-06 22:59:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:59:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 163 transitions. [2021-01-06 22:59:14,691 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 163 transitions. Word has length 24 [2021-01-06 22:59:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:14,691 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 163 transitions. [2021-01-06 22:59:14,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 163 transitions. [2021-01-06 22:59:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:14,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:14,692 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:14,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:14,893 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash 398488074, now seen corresponding path program 80 times [2021-01-06 22:59:14,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:14,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716915626] [2021-01-06 22:59:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716915626] [2021-01-06 22:59:15,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221436924] [2021-01-06 22:59:15,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:15,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:15,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:15,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:15,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901950932] [2021-01-06 22:59:15,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:15,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:15,253 INFO L87 Difference]: Start difference. First operand 68 states and 163 transitions. Second operand 21 states. [2021-01-06 22:59:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:15,645 INFO L93 Difference]: Finished difference Result 134 states and 299 transitions. [2021-01-06 22:59:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:59:15,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:15,647 INFO L225 Difference]: With dead ends: 134 [2021-01-06 22:59:15,647 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 22:59:15,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=431, Invalid=975, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:59:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 22:59:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 72. [2021-01-06 22:59:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 22:59:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 175 transitions. [2021-01-06 22:59:15,650 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 175 transitions. Word has length 24 [2021-01-06 22:59:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:15,650 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 175 transitions. [2021-01-06 22:59:15,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 175 transitions. [2021-01-06 22:59:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:15,650 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:15,651 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:15,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:15,854 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:15,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1509235330, now seen corresponding path program 81 times [2021-01-06 22:59:15,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194006531] [2021-01-06 22:59:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:16,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194006531] [2021-01-06 22:59:16,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8209595] [2021-01-06 22:59:16,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:16,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:59:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:16,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:16,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:16,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:16,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901187587] [2021-01-06 22:59:16,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:16,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:16,199 INFO L87 Difference]: Start difference. First operand 72 states and 175 transitions. Second operand 21 states. [2021-01-06 22:59:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:16,681 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2021-01-06 22:59:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:59:16,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:16,683 INFO L225 Difference]: With dead ends: 129 [2021-01-06 22:59:16,683 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 22:59:16,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:59:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 22:59:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-01-06 22:59:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 22:59:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2021-01-06 22:59:16,688 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 24 [2021-01-06 22:59:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:16,688 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2021-01-06 22:59:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2021-01-06 22:59:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:16,689 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:16,689 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:16,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-01-06 22:59:16,902 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash 933855482, now seen corresponding path program 82 times [2021-01-06 22:59:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:16,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778480910] [2021-01-06 22:59:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:17,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778480910] [2021-01-06 22:59:17,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111604022] [2021-01-06 22:59:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:17,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:17,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:17,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:17,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294976911] [2021-01-06 22:59:17,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:17,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:17,227 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 21 states. [2021-01-06 22:59:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:17,771 INFO L93 Difference]: Finished difference Result 127 states and 289 transitions. [2021-01-06 22:59:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:17,772 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:17,773 INFO L225 Difference]: With dead ends: 127 [2021-01-06 22:59:17,773 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 22:59:17,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:59:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 22:59:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-01-06 22:59:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:59:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2021-01-06 22:59:17,777 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 24 [2021-01-06 22:59:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:17,777 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2021-01-06 22:59:17,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2021-01-06 22:59:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:17,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:17,778 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:17,979 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1773479282, now seen corresponding path program 83 times [2021-01-06 22:59:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:17,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342156831] [2021-01-06 22:59:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342156831] [2021-01-06 22:59:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375767681] [2021-01-06 22:59:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:18,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:59:18,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:18,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:18,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815804547] [2021-01-06 22:59:18,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:18,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:18,308 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 21 states. [2021-01-06 22:59:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:18,914 INFO L93 Difference]: Finished difference Result 125 states and 287 transitions. [2021-01-06 22:59:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:18,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:18,916 INFO L225 Difference]: With dead ends: 125 [2021-01-06 22:59:18,917 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 22:59:18,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 22:59:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-01-06 22:59:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 22:59:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2021-01-06 22:59:18,919 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 24 [2021-01-06 22:59:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2021-01-06 22:59:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2021-01-06 22:59:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:18,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:18,921 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:19,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:19,134 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:19,134 INFO L82 PathProgramCache]: Analyzing trace with hash -120616982, now seen corresponding path program 84 times [2021-01-06 22:59:19,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:19,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308511739] [2021-01-06 22:59:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:19,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308511739] [2021-01-06 22:59:19,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784998304] [2021-01-06 22:59:19,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:19,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:59:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:19,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:19,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:19,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844358575] [2021-01-06 22:59:19,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:19,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:19,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:19,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:19,465 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 21 states. [2021-01-06 22:59:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:20,100 INFO L93 Difference]: Finished difference Result 123 states and 285 transitions. [2021-01-06 22:59:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:20,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:20,102 INFO L225 Difference]: With dead ends: 123 [2021-01-06 22:59:20,102 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 22:59:20,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:59:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 22:59:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-01-06 22:59:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 22:59:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2021-01-06 22:59:20,105 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 24 [2021-01-06 22:59:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:20,106 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2021-01-06 22:59:20,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2021-01-06 22:59:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:20,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:20,106 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:20,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 22:59:20,318 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1248843678, now seen corresponding path program 85 times [2021-01-06 22:59:20,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:20,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630434537] [2021-01-06 22:59:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630434537] [2021-01-06 22:59:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322274843] [2021-01-06 22:59:20,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:20,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:20,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:20,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213525123] [2021-01-06 22:59:20,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:20,619 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 21 states. [2021-01-06 22:59:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:21,299 INFO L93 Difference]: Finished difference Result 121 states and 283 transitions. [2021-01-06 22:59:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:21,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:21,301 INFO L225 Difference]: With dead ends: 121 [2021-01-06 22:59:21,302 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 22:59:21,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:59:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 22:59:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2021-01-06 22:59:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 22:59:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2021-01-06 22:59:21,306 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 24 [2021-01-06 22:59:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:21,306 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2021-01-06 22:59:21,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2021-01-06 22:59:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:21,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:21,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:21,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:21,508 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1334933798, now seen corresponding path program 86 times [2021-01-06 22:59:21,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:21,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85429199] [2021-01-06 22:59:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:21,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85429199] [2021-01-06 22:59:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699782172] [2021-01-06 22:59:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:21,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:21,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:21,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:21,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:21,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165647447] [2021-01-06 22:59:21,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:21,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:21,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:21,814 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 21 states. [2021-01-06 22:59:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:22,523 INFO L93 Difference]: Finished difference Result 120 states and 283 transitions. [2021-01-06 22:59:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:22,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:22,525 INFO L225 Difference]: With dead ends: 120 [2021-01-06 22:59:22,525 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 22:59:22,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=1731, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 22:59:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 22:59:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2021-01-06 22:59:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 22:59:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2021-01-06 22:59:22,528 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 24 [2021-01-06 22:59:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:22,529 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2021-01-06 22:59:22,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2021-01-06 22:59:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:22,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:22,529 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:22,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-06 22:59:22,730 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1312650874, now seen corresponding path program 87 times [2021-01-06 22:59:22,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:22,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389795008] [2021-01-06 22:59:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:22,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389795008] [2021-01-06 22:59:22,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753370310] [2021-01-06 22:59:22,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:23,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:59:23,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:23,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:23,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 22:59:23,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325917378] [2021-01-06 22:59:23,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:23,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:23,087 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 21 states. [2021-01-06 22:59:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:24,059 INFO L93 Difference]: Finished difference Result 134 states and 322 transitions. [2021-01-06 22:59:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 22:59:24,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:24,061 INFO L225 Difference]: With dead ends: 134 [2021-01-06 22:59:24,061 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 22:59:24,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=777, Invalid=1979, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 22:59:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 22:59:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2021-01-06 22:59:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 22:59:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2021-01-06 22:59:24,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 24 [2021-01-06 22:59:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:24,065 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2021-01-06 22:59:24,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2021-01-06 22:59:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:24,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:24,066 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:24,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:24,266 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2038282157, now seen corresponding path program 88 times [2021-01-06 22:59:24,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:24,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426660665] [2021-01-06 22:59:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426660665] [2021-01-06 22:59:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001691008] [2021-01-06 22:59:24,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:24,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:24,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:24,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368632054] [2021-01-06 22:59:24,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:24,566 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 21 states. [2021-01-06 22:59:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:25,323 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2021-01-06 22:59:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:25,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2021-01-06 22:59:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:25,330 INFO L225 Difference]: With dead ends: 144 [2021-01-06 22:59:25,331 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 22:59:25,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=823, Invalid=1829, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 22:59:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 22:59:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2021-01-06 22:59:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 22:59:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 235 transitions. [2021-01-06 22:59:25,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 235 transitions. Word has length 25 [2021-01-06 22:59:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:25,334 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 235 transitions. [2021-01-06 22:59:25,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 235 transitions. [2021-01-06 22:59:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:25,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:25,335 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:25,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-01-06 22:59:25,548 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2037564073, now seen corresponding path program 89 times [2021-01-06 22:59:25,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:25,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682889422] [2021-01-06 22:59:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682889422] [2021-01-06 22:59:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803038508] [2021-01-06 22:59:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:25,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:25,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:25,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:25,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:25,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-01-06 22:59:25,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053865773] [2021-01-06 22:59:25,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:25,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:25,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:25,902 INFO L87 Difference]: Start difference. First operand 91 states and 235 transitions. Second operand 23 states. [2021-01-06 22:59:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:26,996 INFO L93 Difference]: Finished difference Result 139 states and 334 transitions. [2021-01-06 22:59:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 22:59:26,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2021-01-06 22:59:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:26,998 INFO L225 Difference]: With dead ends: 139 [2021-01-06 22:59:26,998 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 22:59:26,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=995, Invalid=2197, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 22:59:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 22:59:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-01-06 22:59:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-01-06 22:59:27,002 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 25 [2021-01-06 22:59:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:27,002 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-01-06 22:59:27,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-01-06 22:59:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:27,002 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:27,003 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:27,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:27,204 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1665678122, now seen corresponding path program 90 times [2021-01-06 22:59:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:27,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508687975] [2021-01-06 22:59:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508687975] [2021-01-06 22:59:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521153819] [2021-01-06 22:59:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:27,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:27,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:27,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:27,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455947690] [2021-01-06 22:59:27,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:27,591 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand 21 states. [2021-01-06 22:59:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:28,076 INFO L93 Difference]: Finished difference Result 122 states and 279 transitions. [2021-01-06 22:59:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:28,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:28,078 INFO L225 Difference]: With dead ends: 122 [2021-01-06 22:59:28,078 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 22:59:28,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:59:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 22:59:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2021-01-06 22:59:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 22:59:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 223 transitions. [2021-01-06 22:59:28,083 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 223 transitions. Word has length 26 [2021-01-06 22:59:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:28,083 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 223 transitions. [2021-01-06 22:59:28,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 223 transitions. [2021-01-06 22:59:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:28,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:28,084 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:28,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-01-06 22:59:28,298 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1739104690, now seen corresponding path program 91 times [2021-01-06 22:59:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:28,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185536158] [2021-01-06 22:59:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:28,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185536158] [2021-01-06 22:59:28,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987070430] [2021-01-06 22:59:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:28,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:28,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:28,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243615941] [2021-01-06 22:59:28,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:28,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:28,637 INFO L87 Difference]: Start difference. First operand 94 states and 223 transitions. Second operand 21 states. [2021-01-06 22:59:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:29,186 INFO L93 Difference]: Finished difference Result 137 states and 311 transitions. [2021-01-06 22:59:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:29,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:29,188 INFO L225 Difference]: With dead ends: 137 [2021-01-06 22:59:29,188 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 22:59:29,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 22:59:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2021-01-06 22:59:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 22:59:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 229 transitions. [2021-01-06 22:59:29,192 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 229 transitions. Word has length 26 [2021-01-06 22:59:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 229 transitions. [2021-01-06 22:59:29,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 229 transitions. [2021-01-06 22:59:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:29,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:29,193 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:29,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:29,394 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1082198586, now seen corresponding path program 92 times [2021-01-06 22:59:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:29,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945376212] [2021-01-06 22:59:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945376212] [2021-01-06 22:59:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178498601] [2021-01-06 22:59:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:29,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:29,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:29,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:29,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248023220] [2021-01-06 22:59:29,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:29,740 INFO L87 Difference]: Start difference. First operand 96 states and 229 transitions. Second operand 21 states. [2021-01-06 22:59:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:30,375 INFO L93 Difference]: Finished difference Result 135 states and 309 transitions. [2021-01-06 22:59:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:30,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:30,377 INFO L225 Difference]: With dead ends: 135 [2021-01-06 22:59:30,377 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 22:59:30,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:59:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 22:59:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-01-06 22:59:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 22:59:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-01-06 22:59:30,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 26 [2021-01-06 22:59:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:30,381 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-01-06 22:59:30,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-01-06 22:59:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:30,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:30,382 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:30,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:30,585 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1340732610, now seen corresponding path program 93 times [2021-01-06 22:59:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:30,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725059054] [2021-01-06 22:59:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725059054] [2021-01-06 22:59:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638373827] [2021-01-06 22:59:30,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:30,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:30,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:30,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:30,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:30,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148356826] [2021-01-06 22:59:30,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:30,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:30,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:30,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:30,923 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand 21 states. [2021-01-06 22:59:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:31,553 INFO L93 Difference]: Finished difference Result 133 states and 307 transitions. [2021-01-06 22:59:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:31,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:31,555 INFO L225 Difference]: With dead ends: 133 [2021-01-06 22:59:31,555 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 22:59:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:59:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 22:59:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2021-01-06 22:59:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 22:59:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 241 transitions. [2021-01-06 22:59:31,559 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 241 transitions. Word has length 26 [2021-01-06 22:59:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:31,559 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 241 transitions. [2021-01-06 22:59:31,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 241 transitions. [2021-01-06 22:59:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:31,560 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:31,560 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:31,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:31,776 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1541676726, now seen corresponding path program 94 times [2021-01-06 22:59:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:31,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590851674] [2021-01-06 22:59:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:32,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590851674] [2021-01-06 22:59:32,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863439641] [2021-01-06 22:59:32,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:32,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:32,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:32,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:32,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:32,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:32,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013974066] [2021-01-06 22:59:32,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:32,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:32,094 INFO L87 Difference]: Start difference. First operand 100 states and 241 transitions. Second operand 21 states. [2021-01-06 22:59:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:32,822 INFO L93 Difference]: Finished difference Result 131 states and 305 transitions. [2021-01-06 22:59:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:32,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:32,824 INFO L225 Difference]: With dead ends: 131 [2021-01-06 22:59:32,824 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 22:59:32,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 22:59:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 22:59:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2021-01-06 22:59:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 22:59:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2021-01-06 22:59:32,828 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 26 [2021-01-06 22:59:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:32,828 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2021-01-06 22:59:32,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2021-01-06 22:59:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:32,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:32,829 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:33,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:33,043 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2138001362, now seen corresponding path program 95 times [2021-01-06 22:59:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:33,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656775633] [2021-01-06 22:59:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:33,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656775633] [2021-01-06 22:59:33,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231450193] [2021-01-06 22:59:33,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:33,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:33,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:33,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:33,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:33,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:33,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411661934] [2021-01-06 22:59:33,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:33,349 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 21 states. [2021-01-06 22:59:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:34,112 INFO L93 Difference]: Finished difference Result 129 states and 303 transitions. [2021-01-06 22:59:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:34,112 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:34,114 INFO L225 Difference]: With dead ends: 129 [2021-01-06 22:59:34,114 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 22:59:34,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 22:59:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 22:59:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2021-01-06 22:59:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 22:59:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 253 transitions. [2021-01-06 22:59:34,117 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 253 transitions. Word has length 26 [2021-01-06 22:59:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:34,118 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 253 transitions. [2021-01-06 22:59:34,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 253 transitions. [2021-01-06 22:59:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:34,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:34,118 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:34,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-01-06 22:59:34,321 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:34,322 INFO L82 PathProgramCache]: Analyzing trace with hash -530792358, now seen corresponding path program 96 times [2021-01-06 22:59:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329987802] [2021-01-06 22:59:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:34,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329987802] [2021-01-06 22:59:34,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411388920] [2021-01-06 22:59:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:34,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 22:59:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:34,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:34,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:34,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603889934] [2021-01-06 22:59:34,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:34,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:34,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:34,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:34,672 INFO L87 Difference]: Start difference. First operand 104 states and 253 transitions. Second operand 21 states. [2021-01-06 22:59:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:35,587 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2021-01-06 22:59:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:35,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:35,589 INFO L225 Difference]: With dead ends: 127 [2021-01-06 22:59:35,589 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 22:59:35,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 22:59:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 22:59:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2021-01-06 22:59:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 22:59:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2021-01-06 22:59:35,593 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 26 [2021-01-06 22:59:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:35,593 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2021-01-06 22:59:35,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2021-01-06 22:59:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:35,594 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:35,594 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:35,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:35,803 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 159167202, now seen corresponding path program 97 times [2021-01-06 22:59:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:35,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553637157] [2021-01-06 22:59:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:36,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553637157] [2021-01-06 22:59:36,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602311901] [2021-01-06 22:59:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:36,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:36,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-01-06 22:59:36,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519922693] [2021-01-06 22:59:36,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:36,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:36,097 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 21 states. [2021-01-06 22:59:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:36,961 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2021-01-06 22:59:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 22:59:36,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 22:59:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:36,963 INFO L225 Difference]: With dead ends: 149 [2021-01-06 22:59:36,963 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 22:59:36,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 22:59:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 22:59:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-01-06 22:59:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 22:59:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 283 transitions. [2021-01-06 22:59:36,967 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 283 transitions. Word has length 26 [2021-01-06 22:59:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:36,967 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 283 transitions. [2021-01-06 22:59:36,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 283 transitions. [2021-01-06 22:59:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:36,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:36,968 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:37,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-01-06 22:59:37,181 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash 159885286, now seen corresponding path program 98 times [2021-01-06 22:59:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:37,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180744953] [2021-01-06 22:59:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:37,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180744953] [2021-01-06 22:59:37,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511107039] [2021-01-06 22:59:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:37,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:37,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:37,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:37,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 22:59:37,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634412629] [2021-01-06 22:59:37,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 22:59:37,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 22:59:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:59:37,537 INFO L87 Difference]: Start difference. First operand 113 states and 283 transitions. Second operand 24 states. [2021-01-06 22:59:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:38,700 INFO L93 Difference]: Finished difference Result 144 states and 349 transitions. [2021-01-06 22:59:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 22:59:38,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2021-01-06 22:59:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:38,704 INFO L225 Difference]: With dead ends: 144 [2021-01-06 22:59:38,704 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 22:59:38,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1197, Invalid=2585, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 22:59:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 22:59:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2021-01-06 22:59:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 22:59:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2021-01-06 22:59:38,706 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2021-01-06 22:59:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:38,706 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2021-01-06 22:59:38,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 22:59:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2021-01-06 22:59:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:38,707 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:38,707 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:38,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 22:59:38,908 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:38,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1360304315, now seen corresponding path program 99 times [2021-01-06 22:59:38,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:38,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182190692] [2021-01-06 22:59:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182190692] [2021-01-06 22:59:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852952210] [2021-01-06 22:59:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:39,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:39,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:39,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:39,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058967494] [2021-01-06 22:59:39,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:39,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:39,358 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2021-01-06 22:59:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:39,888 INFO L93 Difference]: Finished difference Result 102 states and 235 transitions. [2021-01-06 22:59:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:59:39,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2021-01-06 22:59:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:39,890 INFO L225 Difference]: With dead ends: 102 [2021-01-06 22:59:39,890 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 22:59:39,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:59:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 22:59:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-01-06 22:59:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 22:59:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 211 transitions. [2021-01-06 22:59:39,893 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 211 transitions. Word has length 27 [2021-01-06 22:59:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:39,893 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 211 transitions. [2021-01-06 22:59:39,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 211 transitions. [2021-01-06 22:59:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:39,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:39,894 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:40,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 22:59:40,095 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash 69080055, now seen corresponding path program 100 times [2021-01-06 22:59:40,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:40,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592354750] [2021-01-06 22:59:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592354750] [2021-01-06 22:59:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779920817] [2021-01-06 22:59:40,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:40,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:40,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:40,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:40,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:40,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043454228] [2021-01-06 22:59:40,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:40,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:40,497 INFO L87 Difference]: Start difference. First operand 90 states and 211 transitions. Second operand 22 states. [2021-01-06 22:59:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:41,021 INFO L93 Difference]: Finished difference Result 164 states and 363 transitions. [2021-01-06 22:59:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:59:41,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:41,023 INFO L225 Difference]: With dead ends: 164 [2021-01-06 22:59:41,023 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 22:59:41,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:59:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 22:59:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 94. [2021-01-06 22:59:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 22:59:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 223 transitions. [2021-01-06 22:59:41,026 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 223 transitions. Word has length 27 [2021-01-06 22:59:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:41,026 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 223 transitions. [2021-01-06 22:59:41,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 223 transitions. [2021-01-06 22:59:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:41,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:41,026 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:41,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-06 22:59:41,227 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1912535167, now seen corresponding path program 101 times [2021-01-06 22:59:41,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:41,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505917366] [2021-01-06 22:59:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505917366] [2021-01-06 22:59:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410794909] [2021-01-06 22:59:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:41,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:41,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:41,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709500063] [2021-01-06 22:59:41,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:41,602 INFO L87 Difference]: Start difference. First operand 94 states and 223 transitions. Second operand 22 states. [2021-01-06 22:59:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:42,113 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2021-01-06 22:59:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:42,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:42,114 INFO L225 Difference]: With dead ends: 162 [2021-01-06 22:59:42,114 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 22:59:42,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:59:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 22:59:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 96. [2021-01-06 22:59:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 22:59:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 229 transitions. [2021-01-06 22:59:42,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 229 transitions. Word has length 27 [2021-01-06 22:59:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:42,122 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 229 transitions. [2021-01-06 22:59:42,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 229 transitions. [2021-01-06 22:59:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:42,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:42,123 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:42,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:42,337 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1985961735, now seen corresponding path program 102 times [2021-01-06 22:59:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:42,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866321799] [2021-01-06 22:59:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:42,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866321799] [2021-01-06 22:59:42,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342041661] [2021-01-06 22:59:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:42,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:42,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:42,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320270034] [2021-01-06 22:59:42,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:42,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:42,680 INFO L87 Difference]: Start difference. First operand 96 states and 229 transitions. Second operand 22 states. [2021-01-06 22:59:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:43,304 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2021-01-06 22:59:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:43,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:43,306 INFO L225 Difference]: With dead ends: 160 [2021-01-06 22:59:43,306 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 22:59:43,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:59:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 22:59:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-01-06 22:59:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 22:59:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-01-06 22:59:43,312 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 27 [2021-01-06 22:59:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:43,312 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-01-06 22:59:43,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-01-06 22:59:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:43,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:43,315 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:43,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:43,529 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1329055631, now seen corresponding path program 103 times [2021-01-06 22:59:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:43,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703205212] [2021-01-06 22:59:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:43,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703205212] [2021-01-06 22:59:43,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553116679] [2021-01-06 22:59:43,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:43,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:43,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:43,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007912654] [2021-01-06 22:59:43,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:43,883 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand 22 states. [2021-01-06 22:59:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:44,581 INFO L93 Difference]: Finished difference Result 158 states and 357 transitions. [2021-01-06 22:59:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:44,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:44,583 INFO L225 Difference]: With dead ends: 158 [2021-01-06 22:59:44,583 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 22:59:44,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:59:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 22:59:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2021-01-06 22:59:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 22:59:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 241 transitions. [2021-01-06 22:59:44,587 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 241 transitions. Word has length 27 [2021-01-06 22:59:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:44,588 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 241 transitions. [2021-01-06 22:59:44,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 241 transitions. [2021-01-06 22:59:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:44,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:44,588 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:44,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-06 22:59:44,803 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1587589655, now seen corresponding path program 104 times [2021-01-06 22:59:44,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:44,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339594499] [2021-01-06 22:59:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339594499] [2021-01-06 22:59:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663357765] [2021-01-06 22:59:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:45,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:45,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:45,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:45,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:45,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738144956] [2021-01-06 22:59:45,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:45,152 INFO L87 Difference]: Start difference. First operand 100 states and 241 transitions. Second operand 22 states. [2021-01-06 22:59:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:45,904 INFO L93 Difference]: Finished difference Result 156 states and 355 transitions. [2021-01-06 22:59:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:45,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:45,906 INFO L225 Difference]: With dead ends: 156 [2021-01-06 22:59:45,906 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 22:59:45,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:59:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 22:59:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2021-01-06 22:59:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 22:59:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2021-01-06 22:59:45,909 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 27 [2021-01-06 22:59:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:45,910 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2021-01-06 22:59:45,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2021-01-06 22:59:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:45,910 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:45,910 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:46,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-06 22:59:46,126 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1294819681, now seen corresponding path program 105 times [2021-01-06 22:59:46,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:46,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138837677] [2021-01-06 22:59:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138837677] [2021-01-06 22:59:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669338432] [2021-01-06 22:59:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:46,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:46,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 22:59:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:46,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:46,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244340633] [2021-01-06 22:59:46,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:46,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:46,448 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 22 states. [2021-01-06 22:59:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:47,236 INFO L93 Difference]: Finished difference Result 154 states and 353 transitions. [2021-01-06 22:59:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:47,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:47,238 INFO L225 Difference]: With dead ends: 154 [2021-01-06 22:59:47,238 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 22:59:47,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 22:59:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 22:59:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2021-01-06 22:59:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 22:59:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 253 transitions. [2021-01-06 22:59:47,241 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 253 transitions. Word has length 27 [2021-01-06 22:59:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:47,241 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 253 transitions. [2021-01-06 22:59:47,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 253 transitions. [2021-01-06 22:59:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:47,242 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:47,242 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:47,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-01-06 22:59:47,455 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1910108889, now seen corresponding path program 106 times [2021-01-06 22:59:47,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:47,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999667332] [2021-01-06 22:59:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:47,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999667332] [2021-01-06 22:59:47,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838935822] [2021-01-06 22:59:47,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:47,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:47,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:47,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:47,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:47,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:47,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692428874] [2021-01-06 22:59:47,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:47,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:47,787 INFO L87 Difference]: Start difference. First operand 104 states and 253 transitions. Second operand 22 states. [2021-01-06 22:59:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:48,660 INFO L93 Difference]: Finished difference Result 152 states and 351 transitions. [2021-01-06 22:59:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:48,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:48,662 INFO L225 Difference]: With dead ends: 152 [2021-01-06 22:59:48,662 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 22:59:48,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 22:59:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 22:59:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-01-06 22:59:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 22:59:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2021-01-06 22:59:48,666 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 27 [2021-01-06 22:59:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:48,667 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2021-01-06 22:59:48,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2021-01-06 22:59:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:48,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:48,667 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:48,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:48,882 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -283935313, now seen corresponding path program 107 times [2021-01-06 22:59:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:48,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538137040] [2021-01-06 22:59:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:49,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538137040] [2021-01-06 22:59:49,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356313649] [2021-01-06 22:59:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:49,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:49,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:49,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:49,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428306592] [2021-01-06 22:59:49,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:49,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:49,196 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 22 states. [2021-01-06 22:59:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:50,139 INFO L93 Difference]: Finished difference Result 150 states and 349 transitions. [2021-01-06 22:59:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:50,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:50,140 INFO L225 Difference]: With dead ends: 150 [2021-01-06 22:59:50,141 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 22:59:50,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 22:59:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 22:59:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-01-06 22:59:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 22:59:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2021-01-06 22:59:50,144 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 27 [2021-01-06 22:59:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:50,144 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2021-01-06 22:59:50,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2021-01-06 22:59:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:50,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:50,145 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:50,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:50,345 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 406024247, now seen corresponding path program 108 times [2021-01-06 22:59:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:50,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368547080] [2021-01-06 22:59:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:50,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368547080] [2021-01-06 22:59:50,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402869467] [2021-01-06 22:59:50,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:50,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 22:59:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:50,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032378246] [2021-01-06 22:59:50,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:50,684 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand 22 states. [2021-01-06 22:59:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:51,662 INFO L93 Difference]: Finished difference Result 172 states and 405 transitions. [2021-01-06 22:59:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 22:59:51,662 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:51,663 INFO L225 Difference]: With dead ends: 172 [2021-01-06 22:59:51,663 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 22:59:51,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 22:59:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 22:59:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2021-01-06 22:59:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 22:59:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 289 transitions. [2021-01-06 22:59:51,667 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 289 transitions. Word has length 27 [2021-01-06 22:59:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:51,667 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 289 transitions. [2021-01-06 22:59:51,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 289 transitions. [2021-01-06 22:59:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:51,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:51,667 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:51,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-06 22:59:51,874 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash 406742331, now seen corresponding path program 109 times [2021-01-06 22:59:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589558660] [2021-01-06 22:59:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:52,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589558660] [2021-01-06 22:59:52,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519916004] [2021-01-06 22:59:52,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:52,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:52,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:52,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 22:59:52,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104946016] [2021-01-06 22:59:52,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 22:59:52,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:52,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 22:59:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:59:52,240 INFO L87 Difference]: Start difference. First operand 115 states and 289 transitions. Second operand 24 states. [2021-01-06 22:59:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:53,525 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2021-01-06 22:59:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 22:59:53,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2021-01-06 22:59:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:53,527 INFO L225 Difference]: With dead ends: 150 [2021-01-06 22:59:53,527 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 22:59:53,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 22:59:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 22:59:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2021-01-06 22:59:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 22:59:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2021-01-06 22:59:53,531 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 27 [2021-01-06 22:59:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:53,531 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2021-01-06 22:59:53,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 22:59:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2021-01-06 22:59:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 22:59:53,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:53,532 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-01-06 22:59:53,748 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash 780243396, now seen corresponding path program 110 times [2021-01-06 22:59:53,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:53,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690905750] [2021-01-06 22:59:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 22:59:53,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 22:59:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 22:59:53,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 22:59:53,805 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 22:59:53,806 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 22:59:53,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-01-06 22:59:53,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 10:59:53 BasicIcfg [2021-01-06 22:59:53,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 22:59:53,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 22:59:53,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 22:59:53,887 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 22:59:53,887 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:58:04" (3/4) ... [2021-01-06 22:59:53,890 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 22:59:53,989 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-longer-2.i-witness.graphml [2021-01-06 22:59:53,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 22:59:53,995 INFO L168 Benchmark]: Toolchain (without parser) took 110952.04 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 118.0 MB in the beginning and 129.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 168.2 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:53,996 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 163.6 MB. Free memory is still 136.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 22:59:53,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.27 ms. Allocated memory is still 163.6 MB. Free memory was 117.8 MB in the beginning and 129.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,001 INFO L168 Benchmark]: Boogie Procedure Inliner took 113.30 ms. Allocated memory is still 163.6 MB. Free memory was 129.7 MB in the beginning and 142.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,002 INFO L168 Benchmark]: Boogie Preprocessor took 77.24 ms. Allocated memory is still 163.6 MB. Free memory was 142.8 MB in the beginning and 141.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,002 INFO L168 Benchmark]: RCFGBuilder took 580.59 ms. Allocated memory is still 163.6 MB. Free memory was 141.3 MB in the beginning and 121.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,003 INFO L168 Benchmark]: TraceAbstraction took 109357.21 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 120.8 MB in the beginning and 138.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 162.3 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,003 INFO L168 Benchmark]: Witness Printer took 103.09 ms. Allocated memory is still 342.9 MB. Free memory was 138.3 MB in the beginning and 129.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:54,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 163.6 MB. Free memory is still 136.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 709.27 ms. Allocated memory is still 163.6 MB. Free memory was 117.8 MB in the beginning and 129.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 113.30 ms. Allocated memory is still 163.6 MB. Free memory was 129.7 MB in the beginning and 142.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.24 ms. Allocated memory is still 163.6 MB. Free memory was 142.8 MB in the beginning and 141.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 580.59 ms. Allocated memory is still 163.6 MB. Free memory was 141.3 MB in the beginning and 121.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 109357.21 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 120.8 MB in the beginning and 138.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 162.3 MB. Max. memory is 8.0 GB. * Witness Printer took 103.09 ms. Allocated memory is still 342.9 MB. Free memory was 138.3 MB in the beginning and 129.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 109.1s, OverallIterations: 114, TraceHistogramMax: 10, AutomataDifference: 52.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 1638 SDtfs, 6245 SDslu, 9457 SDs, 0 SdLazy, 10719 SolverSat, 6889 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5711 GetRequests, 1969 SyntacticMatches, 0 SemanticMatches, 3742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34261 ImplicationChecksByTransitivity, 50.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 113 MinimizatonAttempts, 3325 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 4414 NumberOfCodeBlocks, 4414 NumberOfCodeBlocksAsserted, 536 NumberOfCheckSat, 4168 ConstructedInterpolants, 0 QuantifiedInterpolants, 384256 SizeOfPredicates, 1318 NumberOfNonLiveVariables, 14990 ConjunctsInSsa, 1976 ConjunctsInUnsatCore, 218 InterpolantComputations, 8 PerfectInterpolantSequences, 56/8040 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...