/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/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:52:34,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:52:34,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:52:34,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 22:52:34,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 22:52:34,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 22:52:34,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 22:52:34,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 22:52:34,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 22:52:34,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 22:52:34,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 22:52:34,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 22:52:34,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:52:34,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:52:34,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:52:34,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:52:34,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:52:34,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:52:34,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:52:34,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:52:34,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:52:34,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:52:34,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:52:34,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:52:34,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 22:52:34,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 22:52:34,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 22:52:34,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 22:52:34,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 22:52:34,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 22:52:34,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 22:52:34,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 22:52:34,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 22:52:34,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:52:34,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:52:34,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:52:34,260 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 22:52:34,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:52:34,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:52:34,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:52:34,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:52:34,311 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:52:34,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:52:34,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:52:34,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:52:34,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:52:34,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:52:34,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:52:34,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:52:34,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:52:34,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:52:34,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:52:34,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:52:34,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:52:34,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:52:34,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:52:34,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:52:34,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:52:34,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:52:34,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:52:34,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:52:34,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:52:34,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:52:34,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:52:34,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:52:34,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:52:34,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:52:34,773 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:52:34,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longer-1.i [2021-01-06 22:52:34,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3602c4e53/de71c638bd734420a173699141c143ea/FLAG0476e2309 [2021-01-06 22:52:35,452 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:52:35,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longer-1.i [2021-01-06 22:52:35,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3602c4e53/de71c638bd734420a173699141c143ea/FLAG0476e2309 [2021-01-06 22:52:35,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3602c4e53/de71c638bd734420a173699141c143ea [2021-01-06 22:52:35,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:52:35,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:52:35,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:52:35,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:52:35,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:52:35,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:52:35" (1/1) ... [2021-01-06 22:52:35,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138aa68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:35, skipping insertion in model container [2021-01-06 22:52:35,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:52:35" (1/1) ... [2021-01-06 22:52:35,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:52:35,840 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2021-01-06 22:52:36,326 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/fib_bench_longer-1.i[30927,30940] [2021-01-06 22:52:36,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:52:36,341 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2021-01-06 22:52:36,421 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/fib_bench_longer-1.i[30927,30940] [2021-01-06 22:52:36,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:52:36,518 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:52:36,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36 WrapperNode [2021-01-06 22:52:36,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:52:36,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:52:36,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:52:36,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:52:36,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:52:36,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:52:36,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:52:36,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:52:36,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (1/1) ... [2021-01-06 22:52:36,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:52:36,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:52:36,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:52:36,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:52:36,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (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 22:52:36,772 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-06 22:52:36,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-06 22:52:36,772 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-06 22:52:36,772 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:52:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-06 22:52:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:52:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:52:36,776 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 22:52:37,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:52:37,197 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 22:52:37,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:52:37 BoogieIcfgContainer [2021-01-06 22:52:37,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:52:37,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:52:37,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:52:37,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:52:37,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:52:35" (1/3) ... [2021-01-06 22:52:37,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3e884a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:52:37, skipping insertion in model container [2021-01-06 22:52:37,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:36" (2/3) ... [2021-01-06 22:52:37,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3e884a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:52:37, skipping insertion in model container [2021-01-06 22:52:37,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:52:37" (3/3) ... [2021-01-06 22:52:37,208 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-01-06 22:52:37,215 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:52:37,215 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:52:37,220 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 22:52:37,221 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:52:37,263 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,263 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,263 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,263 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,264 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,264 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,264 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,265 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,266 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,267 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,267 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,269 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,269 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,270 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,270 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,270 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,271 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,271 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,271 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,271 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,272 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,273 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,273 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,273 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,274 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,275 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,275 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,275 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,276 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,276 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,276 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,277 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,277 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,278 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,278 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,280 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,281 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,283 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,284 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,286 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,286 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,295 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,295 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:37,299 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-06 22:52:37,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 22:52:37,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:52:37,356 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:52:37,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:52:37,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:52:37,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:52:37,357 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:52:37,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:52:37,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:52:37,374 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:52:37,377 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:37,382 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:37,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:37,460 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2021-01-06 22:52:37,460 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-01-06 22:52:37,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 60 events. 5/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-01-06 22:52:37,471 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2021-01-06 22:52:39,969 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-01-06 22:52:40,077 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-01-06 22:52:40,407 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-01-06 22:52:40,547 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-01-06 22:52:40,845 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-01-06 22:52:40,980 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-01-06 22:52:40,986 INFO L131 LiptonReduction]: Checked pairs total: 1025 [2021-01-06 22:52:40,987 INFO L133 LiptonReduction]: Total number of compositions: 55 [2021-01-06 22:52:40,993 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-01-06 22:52:41,003 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2021-01-06 22:52:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 22:52:41,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 22:52:41,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:41,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 22:52:41,012 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1040872604, now seen corresponding path program 1 times [2021-01-06 22:52:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:41,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241432160] [2021-01-06 22:52:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:41,272 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 22:52:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241432160] [2021-01-06 22:52:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:41,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:52:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977545348] [2021-01-06 22:52:41,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:52:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:52:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:52:41,306 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-01-06 22:52:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:41,363 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2021-01-06 22:52:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:52:41,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 22:52:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:41,376 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:52:41,376 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 22:52:41,377 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 22:52:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 22:52:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-01-06 22:52:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:52:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2021-01-06 22:52:41,420 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2021-01-06 22:52:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:41,420 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2021-01-06 22:52:41,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:52:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2021-01-06 22:52:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:41,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:41,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:41,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 22:52:41,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:41,423 INFO L82 PathProgramCache]: Analyzing trace with hash 947244113, now seen corresponding path program 1 times [2021-01-06 22:52:41,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:41,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260987909] [2021-01-06 22:52:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:41,601 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 22:52:41,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260987909] [2021-01-06 22:52:41,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:41,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505766683] [2021-01-06 22:52:41,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:41,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:41,605 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2021-01-06 22:52:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:41,661 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2021-01-06 22:52:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:41,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:41,668 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:52:41,668 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 22:52:41,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:52:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 22:52:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2021-01-06 22:52:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:52:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2021-01-06 22:52:41,693 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2021-01-06 22:52:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:41,697 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2021-01-06 22:52:41,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2021-01-06 22:52:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:41,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:41,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:41,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 22:52:41,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash 448812566, now seen corresponding path program 1 times [2021-01-06 22:52:41,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:41,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543595233] [2021-01-06 22:52:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:41,806 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 22:52:41,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543595233] [2021-01-06 22:52:41,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:41,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:41,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919028946] [2021-01-06 22:52:41,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:41,809 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2021-01-06 22:52:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:41,839 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2021-01-06 22:52:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:52:41,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:41,841 INFO L225 Difference]: With dead ends: 73 [2021-01-06 22:52:41,841 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 22:52:41,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 22:52:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-01-06 22:52:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:52:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2021-01-06 22:52:41,880 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2021-01-06 22:52:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:41,881 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2021-01-06 22:52:41,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2021-01-06 22:52:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:41,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:41,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:41,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 22:52:41,884 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash 449093426, now seen corresponding path program 2 times [2021-01-06 22:52:41,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:41,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777808460] [2021-01-06 22:52:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:41,983 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 22:52:41,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777808460] [2021-01-06 22:52:41,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:41,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:41,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448068905] [2021-01-06 22:52:41,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:41,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:41,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:41,986 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2021-01-06 22:52:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:42,056 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2021-01-06 22:52:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:42,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:42,058 INFO L225 Difference]: With dead ends: 86 [2021-01-06 22:52:42,058 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 22:52:42,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:52:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 22:52:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-01-06 22:52:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:52:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2021-01-06 22:52:42,069 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2021-01-06 22:52:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:42,069 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2021-01-06 22:52:42,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2021-01-06 22:52:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:42,070 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:42,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:42,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 22:52:42,071 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash -672996833, now seen corresponding path program 2 times [2021-01-06 22:52:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:42,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408568960] [2021-01-06 22:52:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:42,174 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 22:52:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408568960] [2021-01-06 22:52:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777451365] [2021-01-06 22:52:42,175 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 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 22:52:42,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:42,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:42,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:42,502 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 22:52:42,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:42,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-01-06 22:52:42,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383302157] [2021-01-06 22:52:42,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:52:42,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:52:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:42,506 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2021-01-06 22:52:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:42,648 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2021-01-06 22:52:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:52:42,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-01-06 22:52:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:42,650 INFO L225 Difference]: With dead ends: 121 [2021-01-06 22:52:42,650 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:52:42,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:52:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:52:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2021-01-06 22:52:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:52:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2021-01-06 22:52:42,660 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2021-01-06 22:52:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:42,660 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2021-01-06 22:52:42,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:52:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2021-01-06 22:52:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:42,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:42,661 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:42,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:42,876 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1028288236, now seen corresponding path program 3 times [2021-01-06 22:52:42,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:42,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903771745] [2021-01-06 22:52:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:42,962 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 22:52:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903771745] [2021-01-06 22:52:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48763042] [2021-01-06 22:52:42,963 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 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 22:52:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:43,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:43,140 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 22:52:43,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:43,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-01-06 22:52:43,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004366991] [2021-01-06 22:52:43,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:52:43,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:52:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:43,144 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 10 states. [2021-01-06 22:52:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:43,200 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2021-01-06 22:52:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:52:43,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-01-06 22:52:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:43,202 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:52:43,202 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 22:52:43,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 22:52:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-01-06 22:52:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:52:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2021-01-06 22:52:43,212 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2021-01-06 22:52:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2021-01-06 22:52:43,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:52:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2021-01-06 22:52:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:43,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:43,214 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:43,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:43,428 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1036994896, now seen corresponding path program 4 times [2021-01-06 22:52:43,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:43,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141687249] [2021-01-06 22:52:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:43,516 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 22:52:43,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141687249] [2021-01-06 22:52:43,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317949911] [2021-01-06 22:52:43,519 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 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 22:52:43,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:43,727 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 22:52:43,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:43,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-01-06 22:52:43,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696225961] [2021-01-06 22:52:43,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:52:43,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:52:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:43,734 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 10 states. [2021-01-06 22:52:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:43,800 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2021-01-06 22:52:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:43,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-01-06 22:52:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:43,802 INFO L225 Difference]: With dead ends: 95 [2021-01-06 22:52:43,802 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 22:52:43,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 22:52:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-01-06 22:52:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 22:52:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2021-01-06 22:52:43,811 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2021-01-06 22:52:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:43,812 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2021-01-06 22:52:43,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:52:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2021-01-06 22:52:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:43,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:43,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:44,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:44,029 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1037016286, now seen corresponding path program 5 times [2021-01-06 22:52:44,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:44,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204204523] [2021-01-06 22:52:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:44,115 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 22:52:44,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204204523] [2021-01-06 22:52:44,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35517880] [2021-01-06 22:52:44,116 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 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 22:52:44,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:44,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:44,261 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 22:52:44,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:44,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-01-06 22:52:44,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033868275] [2021-01-06 22:52:44,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:52:44,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:44,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:52:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:44,263 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2021-01-06 22:52:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:44,347 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2021-01-06 22:52:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:44,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-06 22:52:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:44,349 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:52:44,349 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:52:44,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:52:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:52:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2021-01-06 22:52:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 22:52:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2021-01-06 22:52:44,358 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2021-01-06 22:52:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:44,359 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2021-01-06 22:52:44,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:52:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2021-01-06 22:52:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:44,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:44,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:44,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:44,573 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash -231469117, now seen corresponding path program 1 times [2021-01-06 22:52:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:44,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047762123] [2021-01-06 22:52:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:44,660 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 22:52:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047762123] [2021-01-06 22:52:44,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:44,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562608315] [2021-01-06 22:52:44,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:44,663 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2021-01-06 22:52:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:44,707 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2021-01-06 22:52:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:44,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:44,708 INFO L225 Difference]: With dead ends: 101 [2021-01-06 22:52:44,708 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 22:52:44,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:52:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 22:52:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2021-01-06 22:52:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 22:52:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2021-01-06 22:52:44,717 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2021-01-06 22:52:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:44,718 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2021-01-06 22:52:44,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2021-01-06 22:52:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:44,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:44,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:44,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 22:52:44,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:44,720 INFO L82 PathProgramCache]: Analyzing trace with hash -231188257, now seen corresponding path program 2 times [2021-01-06 22:52:44,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:44,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890349182] [2021-01-06 22:52:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:44,797 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 22:52:44,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890349182] [2021-01-06 22:52:44,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:44,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277852151] [2021-01-06 22:52:44,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:44,800 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2021-01-06 22:52:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:44,867 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2021-01-06 22:52:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:44,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:44,868 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:52:44,869 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 22:52:44,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 22:52:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2021-01-06 22:52:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 22:52:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2021-01-06 22:52:44,880 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2021-01-06 22:52:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:44,881 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2021-01-06 22:52:44,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2021-01-06 22:52:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:44,883 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:44,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:44,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 22:52:44,884 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash -598460671, now seen corresponding path program 3 times [2021-01-06 22:52:44,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:44,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550356450] [2021-01-06 22:52:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:44,965 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 22:52:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550356450] [2021-01-06 22:52:44,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:44,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:44,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519983175] [2021-01-06 22:52:44,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:44,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:44,967 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2021-01-06 22:52:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:45,033 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2021-01-06 22:52:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:45,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:45,035 INFO L225 Difference]: With dead ends: 113 [2021-01-06 22:52:45,035 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 22:52:45,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 22:52:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2021-01-06 22:52:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 22:52:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2021-01-06 22:52:45,041 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2021-01-06 22:52:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:45,041 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2021-01-06 22:52:45,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2021-01-06 22:52:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:45,042 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:45,042 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:45,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 22:52:45,043 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1812164822, now seen corresponding path program 6 times [2021-01-06 22:52:45,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:45,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660035198] [2021-01-06 22:52:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660035198] [2021-01-06 22:52:45,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956470405] [2021-01-06 22:52:45,132 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 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 22:52:45,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:45,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:45,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912536415] [2021-01-06 22:52:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:45,289 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2021-01-06 22:52:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:45,319 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2021-01-06 22:52:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:45,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:45,321 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:52:45,321 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:52:45,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:52:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2021-01-06 22:52:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 22:52:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2021-01-06 22:52:45,328 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2021-01-06 22:52:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:45,329 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2021-01-06 22:52:45,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2021-01-06 22:52:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:45,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:45,330 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:45,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 22:52:45,544 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2082071282, now seen corresponding path program 7 times [2021-01-06 22:52:45,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:45,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517011397] [2021-01-06 22:52:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:45,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517011397] [2021-01-06 22:52:45,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199295382] [2021-01-06 22:52:45,604 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 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 22:52:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:45,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:45,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:45,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600109659] [2021-01-06 22:52:45,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:45,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:45,754 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2021-01-06 22:52:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:45,801 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2021-01-06 22:52:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:52:45,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:45,803 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:52:45,803 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:52:45,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:52:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:52:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-01-06 22:52:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 22:52:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2021-01-06 22:52:45,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2021-01-06 22:52:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:45,808 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2021-01-06 22:52:45,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2021-01-06 22:52:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:45,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:45,809 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:46,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:46,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2082734372, now seen corresponding path program 8 times [2021-01-06 22:52:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:46,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777090869] [2021-01-06 22:52:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:46,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777090869] [2021-01-06 22:52:46,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813149313] [2021-01-06 22:52:46,082 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 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 22:52:46,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:46,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:52:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:46,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157608580] [2021-01-06 22:52:46,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:46,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:46,223 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2021-01-06 22:52:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:46,286 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2021-01-06 22:52:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:46,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:46,288 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:52:46,288 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 22:52:46,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 22:52:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-01-06 22:52:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 22:52:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2021-01-06 22:52:46,293 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2021-01-06 22:52:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:46,294 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2021-01-06 22:52:46,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2021-01-06 22:52:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:46,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:46,295 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:46,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 22:52:46,509 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2082755762, now seen corresponding path program 9 times [2021-01-06 22:52:46,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:46,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139173533] [2021-01-06 22:52:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:46,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139173533] [2021-01-06 22:52:46,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115310973] [2021-01-06 22:52:46,607 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 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 22:52:46,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:46,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:46,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:46,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:46,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:46,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-01-06 22:52:46,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865796075] [2021-01-06 22:52:46,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:52:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:52:46,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:52:46,755 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 12 states. [2021-01-06 22:52:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:46,899 INFO L93 Difference]: Finished difference Result 140 states and 332 transitions. [2021-01-06 22:52:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:52:46,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2021-01-06 22:52:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:46,903 INFO L225 Difference]: With dead ends: 140 [2021-01-06 22:52:46,903 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 22:52:46,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 22:52:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2021-01-06 22:52:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 22:52:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2021-01-06 22:52:46,911 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 10 [2021-01-06 22:52:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:46,912 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2021-01-06 22:52:46,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:52:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2021-01-06 22:52:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:46,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:46,913 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:47,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 22:52:47,127 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1634246561, now seen corresponding path program 3 times [2021-01-06 22:52:47,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592389455] [2021-01-06 22:52:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:47,238 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 22:52:47,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592389455] [2021-01-06 22:52:47,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292151050] [2021-01-06 22:52:47,239 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 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 22:52:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:52:47,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:47,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:47,423 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 22:52:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:52:47,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23421897] [2021-01-06 22:52:47,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:52:47,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:52:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:52:47,429 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand 14 states. [2021-01-06 22:52:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:47,586 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2021-01-06 22:52:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:47,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:52:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:47,588 INFO L225 Difference]: With dead ends: 167 [2021-01-06 22:52:47,588 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 22:52:47,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:52:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 22:52:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2021-01-06 22:52:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 22:52:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 281 transitions. [2021-01-06 22:52:47,596 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 281 transitions. Word has length 11 [2021-01-06 22:52:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:47,596 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 281 transitions. [2021-01-06 22:52:47,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:52:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 281 transitions. [2021-01-06 22:52:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:47,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:47,597 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:47,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 22:52:47,812 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1790110225, now seen corresponding path program 4 times [2021-01-06 22:52:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:47,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059579033] [2021-01-06 22:52:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:47,911 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 22:52:47,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059579033] [2021-01-06 22:52:47,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190642849] [2021-01-06 22:52:47,912 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 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 22:52:47,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:48,048 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 22:52:48,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:48,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:48,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686890640] [2021-01-06 22:52:48,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:48,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:48,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:48,051 INFO L87 Difference]: Start difference. First operand 110 states and 281 transitions. Second operand 11 states. [2021-01-06 22:52:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:48,119 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2021-01-06 22:52:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:48,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:48,121 INFO L225 Difference]: With dead ends: 132 [2021-01-06 22:52:48,121 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 22:52:48,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 22:52:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2021-01-06 22:52:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 22:52:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 293 transitions. [2021-01-06 22:52:48,126 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 293 transitions. Word has length 11 [2021-01-06 22:52:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:48,126 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 293 transitions. [2021-01-06 22:52:48,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 293 transitions. [2021-01-06 22:52:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:48,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,127 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 22:52:48,341 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1790391085, now seen corresponding path program 5 times [2021-01-06 22:52:48,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239887261] [2021-01-06 22:52:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:48,419 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 22:52:48,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239887261] [2021-01-06 22:52:48,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045208359] [2021-01-06 22:52:48,420 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 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 22:52:48,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:48,551 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:52:48,556 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:52:48,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:48,575 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 22:52:48,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:48,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354611722] [2021-01-06 22:52:48,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:48,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:48,581 INFO L87 Difference]: Start difference. First operand 116 states and 293 transitions. Second operand 11 states. [2021-01-06 22:52:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:48,750 INFO L93 Difference]: Finished difference Result 161 states and 390 transitions. [2021-01-06 22:52:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:52:48,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:48,752 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:52:48,752 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 22:52:48,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 22:52:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-01-06 22:52:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 22:52:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2021-01-06 22:52:48,757 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 11 [2021-01-06 22:52:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:48,757 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2021-01-06 22:52:48,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2021-01-06 22:52:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:48,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,758 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 22:52:48,973 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1414392543, now seen corresponding path program 6 times [2021-01-06 22:52:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952893590] [2021-01-06 22:52:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,037 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 22:52:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952893590] [2021-01-06 22:52:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772566872] [2021-01-06 22:52:49,038 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 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 22:52:49,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:49,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:49,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:49,179 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 22:52:49,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:49,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:49,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487632481] [2021-01-06 22:52:49,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:49,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:49,181 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 11 states. [2021-01-06 22:52:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:49,278 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2021-01-06 22:52:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:52:49,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:49,280 INFO L225 Difference]: With dead ends: 142 [2021-01-06 22:52:49,280 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 22:52:49,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:52:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 22:52:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-01-06 22:52:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 22:52:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2021-01-06 22:52:49,285 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2021-01-06 22:52:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:49,285 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2021-01-06 22:52:49,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2021-01-06 22:52:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:49,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:49,286 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:49,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:49,501 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1423099203, now seen corresponding path program 7 times [2021-01-06 22:52:49,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:49,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372861791] [2021-01-06 22:52:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,558 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 22:52:49,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372861791] [2021-01-06 22:52:49,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303414488] [2021-01-06 22:52:49,559 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 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 22:52:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:49,668 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 22:52:49,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:49,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361767595] [2021-01-06 22:52:49,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:49,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:49,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:49,669 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 11 states. [2021-01-06 22:52:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:49,784 INFO L93 Difference]: Finished difference Result 143 states and 347 transitions. [2021-01-06 22:52:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:52:49,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:49,786 INFO L225 Difference]: With dead ends: 143 [2021-01-06 22:52:49,786 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 22:52:49,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:52:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 22:52:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2021-01-06 22:52:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 22:52:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 301 transitions. [2021-01-06 22:52:49,792 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 301 transitions. Word has length 11 [2021-01-06 22:52:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:49,792 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 301 transitions. [2021-01-06 22:52:49,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 301 transitions. [2021-01-06 22:52:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:49,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:49,793 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:50,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-06 22:52:50,007 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1423120593, now seen corresponding path program 8 times [2021-01-06 22:52:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:50,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364007428] [2021-01-06 22:52:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:50,063 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 22:52:50,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364007428] [2021-01-06 22:52:50,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102781510] [2021-01-06 22:52:50,064 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 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 22:52:50,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:50,180 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 22:52:50,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:50,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:50,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813802931] [2021-01-06 22:52:50,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:50,182 INFO L87 Difference]: Start difference. First operand 119 states and 301 transitions. Second operand 11 states. [2021-01-06 22:52:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:50,359 INFO L93 Difference]: Finished difference Result 166 states and 401 transitions. [2021-01-06 22:52:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:50,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:50,363 INFO L225 Difference]: With dead ends: 166 [2021-01-06 22:52:50,363 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 22:52:50,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:52:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 22:52:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-01-06 22:52:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 22:52:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 297 transitions. [2021-01-06 22:52:50,368 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 297 transitions. Word has length 11 [2021-01-06 22:52:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:50,370 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 297 transitions. [2021-01-06 22:52:50,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 297 transitions. [2021-01-06 22:52:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:50,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:50,371 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:50,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:50,572 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1642922929, now seen corresponding path program 9 times [2021-01-06 22:52:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:50,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875142255] [2021-01-06 22:52:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:50,647 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 22:52:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875142255] [2021-01-06 22:52:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106284548] [2021-01-06 22:52:50,647 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 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 22:52:50,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:50,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:50,775 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 22:52:50,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:50,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494225993] [2021-01-06 22:52:50,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:50,777 INFO L87 Difference]: Start difference. First operand 117 states and 297 transitions. Second operand 11 states. [2021-01-06 22:52:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:50,839 INFO L93 Difference]: Finished difference Result 142 states and 347 transitions. [2021-01-06 22:52:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:52:50,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:50,840 INFO L225 Difference]: With dead ends: 142 [2021-01-06 22:52:50,841 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 22:52:50,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 22:52:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2021-01-06 22:52:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 22:52:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 302 transitions. [2021-01-06 22:52:50,847 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 302 transitions. Word has length 11 [2021-01-06 22:52:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:50,847 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 302 transitions. [2021-01-06 22:52:50,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 302 transitions. [2021-01-06 22:52:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:50,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:50,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 22:52:51,062 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1373016469, now seen corresponding path program 10 times [2021-01-06 22:52:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682741285] [2021-01-06 22:52:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,118 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 22:52:51,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682741285] [2021-01-06 22:52:51,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019127420] [2021-01-06 22:52:51,118 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 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 22:52:51,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:51,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:51,237 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 22:52:51,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:51,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:51,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871617880] [2021-01-06 22:52:51,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:51,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:51,239 INFO L87 Difference]: Start difference. First operand 119 states and 302 transitions. Second operand 11 states. [2021-01-06 22:52:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,316 INFO L93 Difference]: Finished difference Result 146 states and 353 transitions. [2021-01-06 22:52:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:52:51,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,318 INFO L225 Difference]: With dead ends: 146 [2021-01-06 22:52:51,318 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 22:52:51,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:52:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 22:52:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2021-01-06 22:52:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 22:52:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 297 transitions. [2021-01-06 22:52:51,324 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 297 transitions. Word has length 11 [2021-01-06 22:52:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 297 transitions. [2021-01-06 22:52:51,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 297 transitions. [2021-01-06 22:52:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:51,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,325 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:51,541 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1372411039, now seen corresponding path program 11 times [2021-01-06 22:52:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393447442] [2021-01-06 22:52:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,602 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 22:52:51,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393447442] [2021-01-06 22:52:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217545050] [2021-01-06 22:52:51,606 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 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 22:52:51,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:51,731 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 22:52:51,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:51,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:51,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97042171] [2021-01-06 22:52:51,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:51,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:51,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:51,733 INFO L87 Difference]: Start difference. First operand 117 states and 297 transitions. Second operand 11 states. [2021-01-06 22:52:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,844 INFO L93 Difference]: Finished difference Result 145 states and 351 transitions. [2021-01-06 22:52:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:52:51,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,846 INFO L225 Difference]: With dead ends: 145 [2021-01-06 22:52:51,846 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 22:52:51,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:52:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 22:52:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2021-01-06 22:52:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 22:52:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 304 transitions. [2021-01-06 22:52:51,851 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 304 transitions. Word has length 11 [2021-01-06 22:52:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,851 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 304 transitions. [2021-01-06 22:52:51,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 304 transitions. [2021-01-06 22:52:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:51,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:52,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 22:52:52,067 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1372391571, now seen corresponding path program 12 times [2021-01-06 22:52:52,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:52,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042795812] [2021-01-06 22:52:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,120 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 22:52:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042795812] [2021-01-06 22:52:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002848477] [2021-01-06 22:52:52,121 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 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 22:52:52,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:52,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:52:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:52,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:52,275 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 22:52:52,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:52,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835928644] [2021-01-06 22:52:52,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:52,277 INFO L87 Difference]: Start difference. First operand 119 states and 304 transitions. Second operand 11 states. [2021-01-06 22:52:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:52,405 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2021-01-06 22:52:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:52:52,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:52,408 INFO L225 Difference]: With dead ends: 163 [2021-01-06 22:52:52,408 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 22:52:52,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 22:52:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2021-01-06 22:52:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 22:52:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 305 transitions. [2021-01-06 22:52:52,414 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 305 transitions. Word has length 11 [2021-01-06 22:52:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:52,414 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 305 transitions. [2021-01-06 22:52:52,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 305 transitions. [2021-01-06 22:52:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:52,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:52,415 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:52,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 22:52:52,630 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1372389649, now seen corresponding path program 13 times [2021-01-06 22:52:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:52,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796374700] [2021-01-06 22:52:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,700 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 22:52:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796374700] [2021-01-06 22:52:52,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182484769] [2021-01-06 22:52:52,706 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 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 22:52:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:52,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:52,826 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 22:52:52,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:52,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261014139] [2021-01-06 22:52:52,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:52,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:52,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:52,828 INFO L87 Difference]: Start difference. First operand 120 states and 305 transitions. Second operand 11 states. [2021-01-06 22:52:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:53,038 INFO L93 Difference]: Finished difference Result 165 states and 401 transitions. [2021-01-06 22:52:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:53,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:53,040 INFO L225 Difference]: With dead ends: 165 [2021-01-06 22:52:53,040 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 22:52:53,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:52:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 22:52:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-01-06 22:52:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 22:52:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 303 transitions. [2021-01-06 22:52:53,046 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 303 transitions. Word has length 11 [2021-01-06 22:52:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:53,046 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 303 transitions. [2021-01-06 22:52:53,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 303 transitions. [2021-01-06 22:52:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:53,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:53,047 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:53,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 22:52:53,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash 34560387, now seen corresponding path program 14 times [2021-01-06 22:52:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:53,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850412858] [2021-01-06 22:52:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:53,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850412858] [2021-01-06 22:52:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960453761] [2021-01-06 22:52:53,346 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 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 22:52:53,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:52:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:53,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:53,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:52:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100626149] [2021-01-06 22:52:53,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:52:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:52:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:53,447 INFO L87 Difference]: Start difference. First operand 119 states and 303 transitions. Second operand 9 states. [2021-01-06 22:52:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:53,515 INFO L93 Difference]: Finished difference Result 147 states and 354 transitions. [2021-01-06 22:52:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:52:53,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 22:52:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:53,517 INFO L225 Difference]: With dead ends: 147 [2021-01-06 22:52:53,517 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 22:52:53,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:52:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 22:52:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2021-01-06 22:52:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 22:52:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 315 transitions. [2021-01-06 22:52:53,522 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 315 transitions. Word has length 12 [2021-01-06 22:52:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:53,522 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 315 transitions. [2021-01-06 22:52:53,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:52:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 315 transitions. [2021-01-06 22:52:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:53,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:53,523 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:53,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 22:52:53,737 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash 34841247, now seen corresponding path program 15 times [2021-01-06 22:52:53,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:53,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88255689] [2021-01-06 22:52:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88255689] [2021-01-06 22:52:53,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135622545] [2021-01-06 22:52:53,824 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 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 22:52:53,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:53,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:52:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:53,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:53,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 22:52:53,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358206290] [2021-01-06 22:52:53,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:52:53,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:52:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:53,927 INFO L87 Difference]: Start difference. First operand 125 states and 315 transitions. Second operand 10 states. [2021-01-06 22:52:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:54,085 INFO L93 Difference]: Finished difference Result 181 states and 434 transitions. [2021-01-06 22:52:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:54,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2021-01-06 22:52:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:54,087 INFO L225 Difference]: With dead ends: 181 [2021-01-06 22:52:54,087 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 22:52:54,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:52:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 22:52:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 120. [2021-01-06 22:52:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 22:52:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 304 transitions. [2021-01-06 22:52:54,093 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 304 transitions. Word has length 12 [2021-01-06 22:52:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:54,093 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 304 transitions. [2021-01-06 22:52:54,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:52:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 304 transitions. [2021-01-06 22:52:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:54,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:54,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:54,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 22:52:54,310 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash -341157295, now seen corresponding path program 16 times [2021-01-06 22:52:54,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:54,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185213618] [2021-01-06 22:52:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:54,398 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 22:52:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185213618] [2021-01-06 22:52:54,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499152503] [2021-01-06 22:52:54,399 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 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 22:52:54,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:54,558 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 22:52:54,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:54,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:54,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220128188] [2021-01-06 22:52:54,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:54,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:54,560 INFO L87 Difference]: Start difference. First operand 120 states and 304 transitions. Second operand 13 states. [2021-01-06 22:52:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:54,713 INFO L93 Difference]: Finished difference Result 161 states and 380 transitions. [2021-01-06 22:52:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:52:54,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:54,714 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:52:54,715 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 22:52:54,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 22:52:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2021-01-06 22:52:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 22:52:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 310 transitions. [2021-01-06 22:52:54,720 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 310 transitions. Word has length 12 [2021-01-06 22:52:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:54,720 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 310 transitions. [2021-01-06 22:52:54,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 310 transitions. [2021-01-06 22:52:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:54,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:54,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:54,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:54,922 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -332450635, now seen corresponding path program 17 times [2021-01-06 22:52:54,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:54,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535351783] [2021-01-06 22:52:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:54,991 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 22:52:54,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535351783] [2021-01-06 22:52:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948663268] [2021-01-06 22:52:54,992 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 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 22:52:55,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:55,146 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 22:52:55,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:55,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:55,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981454187] [2021-01-06 22:52:55,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:55,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:55,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:55,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:55,147 INFO L87 Difference]: Start difference. First operand 124 states and 310 transitions. Second operand 13 states. [2021-01-06 22:52:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:55,365 INFO L93 Difference]: Finished difference Result 159 states and 380 transitions. [2021-01-06 22:52:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:52:55,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:55,367 INFO L225 Difference]: With dead ends: 159 [2021-01-06 22:52:55,367 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 22:52:55,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:52:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 22:52:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2021-01-06 22:52:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 22:52:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 317 transitions. [2021-01-06 22:52:55,373 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 317 transitions. Word has length 12 [2021-01-06 22:52:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:55,373 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 317 transitions. [2021-01-06 22:52:55,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 317 transitions. [2021-01-06 22:52:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:55,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:55,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:55,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:55,589 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash -332429245, now seen corresponding path program 18 times [2021-01-06 22:52:55,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:55,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263163045] [2021-01-06 22:52:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:55,659 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 22:52:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263163045] [2021-01-06 22:52:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244803167] [2021-01-06 22:52:55,660 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 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 22:52:55,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:55,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:52:55,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:52:55,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:55,829 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 22:52:55,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:55,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85887691] [2021-01-06 22:52:55,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:55,831 INFO L87 Difference]: Start difference. First operand 126 states and 317 transitions. Second operand 13 states. [2021-01-06 22:52:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:56,078 INFO L93 Difference]: Finished difference Result 184 states and 442 transitions. [2021-01-06 22:52:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:52:56,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:56,080 INFO L225 Difference]: With dead ends: 184 [2021-01-06 22:52:56,080 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 22:52:56,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:52:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 22:52:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2021-01-06 22:52:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 22:52:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 304 transitions. [2021-01-06 22:52:56,086 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 304 transitions. Word has length 12 [2021-01-06 22:52:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:56,086 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 304 transitions. [2021-01-06 22:52:56,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 304 transitions. [2021-01-06 22:52:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:56,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:56,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:56,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:56,297 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash 896494529, now seen corresponding path program 19 times [2021-01-06 22:52:56,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:56,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114637391] [2021-01-06 22:52:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,388 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 22:52:56,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114637391] [2021-01-06 22:52:56,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978758777] [2021-01-06 22:52:56,389 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 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 22:52:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:56,528 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 22:52:56,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:56,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:56,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913691060] [2021-01-06 22:52:56,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:56,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:56,530 INFO L87 Difference]: Start difference. First operand 120 states and 304 transitions. Second operand 13 states. [2021-01-06 22:52:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:56,660 INFO L93 Difference]: Finished difference Result 163 states and 386 transitions. [2021-01-06 22:52:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:52:56,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:56,662 INFO L225 Difference]: With dead ends: 163 [2021-01-06 22:52:56,662 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 22:52:56,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 22:52:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 125. [2021-01-06 22:52:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 22:52:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 311 transitions. [2021-01-06 22:52:56,667 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 311 transitions. Word has length 12 [2021-01-06 22:52:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 311 transitions. [2021-01-06 22:52:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 311 transitions. [2021-01-06 22:52:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:56,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:56,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:56,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 22:52:56,878 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1166400989, now seen corresponding path program 20 times [2021-01-06 22:52:56,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:56,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367068830] [2021-01-06 22:52:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,937 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 22:52:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367068830] [2021-01-06 22:52:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438212792] [2021-01-06 22:52:56,937 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 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 22:52:56,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:57,096 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 22:52:57,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:57,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:57,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819995818] [2021-01-06 22:52:57,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:57,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:57,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:57,098 INFO L87 Difference]: Start difference. First operand 125 states and 311 transitions. Second operand 13 states. [2021-01-06 22:52:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:57,279 INFO L93 Difference]: Finished difference Result 171 states and 402 transitions. [2021-01-06 22:52:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:52:57,280 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:57,281 INFO L225 Difference]: With dead ends: 171 [2021-01-06 22:52:57,281 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 22:52:57,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:52:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 22:52:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 127. [2021-01-06 22:52:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 22:52:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 318 transitions. [2021-01-06 22:52:57,286 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 318 transitions. Word has length 12 [2021-01-06 22:52:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:57,286 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 318 transitions. [2021-01-06 22:52:57,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 318 transitions. [2021-01-06 22:52:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:57,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:57,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:57,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:57,503 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1167006419, now seen corresponding path program 21 times [2021-01-06 22:52:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:57,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853387585] [2021-01-06 22:52:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:57,568 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 22:52:57,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853387585] [2021-01-06 22:52:57,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416028875] [2021-01-06 22:52:57,569 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 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 22:52:57,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:52:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:57,714 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 22:52:57,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:57,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:57,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205107613] [2021-01-06 22:52:57,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:57,716 INFO L87 Difference]: Start difference. First operand 127 states and 318 transitions. Second operand 13 states. [2021-01-06 22:52:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:57,913 INFO L93 Difference]: Finished difference Result 170 states and 406 transitions. [2021-01-06 22:52:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:52:57,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:57,915 INFO L225 Difference]: With dead ends: 170 [2021-01-06 22:52:57,915 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 22:52:57,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:52:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 22:52:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 130. [2021-01-06 22:52:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 22:52:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 330 transitions. [2021-01-06 22:52:57,920 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 330 transitions. Word has length 12 [2021-01-06 22:52:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:57,920 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 330 transitions. [2021-01-06 22:52:57,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 330 transitions. [2021-01-06 22:52:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:57,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:57,921 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:58,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 22:52:58,133 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1167025887, now seen corresponding path program 22 times [2021-01-06 22:52:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292568640] [2021-01-06 22:52:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:58,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292568640] [2021-01-06 22:52:58,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030700748] [2021-01-06 22:52:58,192 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 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 22:52:58,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:58,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:58,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:58,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:58,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:52:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735832724] [2021-01-06 22:52:58,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:52:58,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:52:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:52:58,330 INFO L87 Difference]: Start difference. First operand 130 states and 330 transitions. Second operand 14 states. [2021-01-06 22:52:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:58,696 INFO L93 Difference]: Finished difference Result 208 states and 493 transitions. [2021-01-06 22:52:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:52:58,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:52:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:58,698 INFO L225 Difference]: With dead ends: 208 [2021-01-06 22:52:58,698 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 22:52:58,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:52:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 22:52:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 130. [2021-01-06 22:52:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 22:52:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2021-01-06 22:52:58,704 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 12 [2021-01-06 22:52:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:58,704 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2021-01-06 22:52:58,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:52:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2021-01-06 22:52:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:58,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:58,705 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:58,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:58,909 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash 608997331, now seen corresponding path program 23 times [2021-01-06 22:52:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:58,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468021940] [2021-01-06 22:52:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:58,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468021940] [2021-01-06 22:52:58,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026120365] [2021-01-06 22:52:58,972 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 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 22:52:59,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:59,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:59,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:59,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:59,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862300005] [2021-01-06 22:52:59,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:59,120 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 13 states. [2021-01-06 22:52:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:59,230 INFO L93 Difference]: Finished difference Result 167 states and 410 transitions. [2021-01-06 22:52:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:52:59,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:59,232 INFO L225 Difference]: With dead ends: 167 [2021-01-06 22:52:59,232 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 22:52:59,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:52:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 22:52:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2021-01-06 22:52:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 22:52:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 340 transitions. [2021-01-06 22:52:59,238 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 340 transitions. Word has length 12 [2021-01-06 22:52:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:59,238 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 340 transitions. [2021-01-06 22:52:59,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 340 transitions. [2021-01-06 22:52:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:59,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:59,239 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:59,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 22:52:59,454 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:59,454 INFO L82 PathProgramCache]: Analyzing trace with hash 609054991, now seen corresponding path program 24 times [2021-01-06 22:52:59,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:59,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448363326] [2021-01-06 22:52:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:59,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448363326] [2021-01-06 22:52:59,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634546835] [2021-01-06 22:52:59,517 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 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 22:52:59,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:59,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:59,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:59,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:52:59,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756140741] [2021-01-06 22:52:59,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:52:59,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:59,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:52:59,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:59,681 INFO L87 Difference]: Start difference. First operand 132 states and 340 transitions. Second operand 13 states. [2021-01-06 22:52:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:59,779 INFO L93 Difference]: Finished difference Result 166 states and 409 transitions. [2021-01-06 22:52:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:59,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:52:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:59,781 INFO L225 Difference]: With dead ends: 166 [2021-01-06 22:52:59,782 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 22:52:59,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:52:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 22:52:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 133. [2021-01-06 22:52:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 22:52:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 342 transitions. [2021-01-06 22:52:59,787 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 342 transitions. Word has length 12 [2021-01-06 22:52:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:59,788 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 342 transitions. [2021-01-06 22:52:59,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:52:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 342 transitions. [2021-01-06 22:52:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:52:59,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:59,788 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:00,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:00,002 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash 386162999, now seen corresponding path program 25 times [2021-01-06 22:53:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881721292] [2021-01-06 22:53:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:00,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881721292] [2021-01-06 22:53:00,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257911938] [2021-01-06 22:53:00,071 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 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 22:53:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:00,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:00,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965653045] [2021-01-06 22:53:00,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:00,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:00,210 INFO L87 Difference]: Start difference. First operand 133 states and 342 transitions. Second operand 13 states. [2021-01-06 22:53:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:00,355 INFO L93 Difference]: Finished difference Result 176 states and 427 transitions. [2021-01-06 22:53:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:00,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:00,357 INFO L225 Difference]: With dead ends: 176 [2021-01-06 22:53:00,357 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 22:53:00,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 22:53:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 133. [2021-01-06 22:53:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 22:53:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 342 transitions. [2021-01-06 22:53:00,362 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 342 transitions. Word has length 12 [2021-01-06 22:53:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:00,362 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 342 transitions. [2021-01-06 22:53:00,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 342 transitions. [2021-01-06 22:53:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:00,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:00,363 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:00,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 22:53:00,578 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:00,579 INFO L82 PathProgramCache]: Analyzing trace with hash 386220659, now seen corresponding path program 26 times [2021-01-06 22:53:00,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:00,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137510747] [2021-01-06 22:53:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137510747] [2021-01-06 22:53:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742337464] [2021-01-06 22:53:00,647 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 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 22:53:00,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:00,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:00,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:00,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989784861] [2021-01-06 22:53:00,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:00,795 INFO L87 Difference]: Start difference. First operand 133 states and 342 transitions. Second operand 13 states. [2021-01-06 22:53:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:00,914 INFO L93 Difference]: Finished difference Result 174 states and 423 transitions. [2021-01-06 22:53:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:00,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:00,916 INFO L225 Difference]: With dead ends: 174 [2021-01-06 22:53:00,916 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 22:53:00,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 22:53:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2021-01-06 22:53:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 22:53:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2021-01-06 22:53:00,921 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2021-01-06 22:53:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:00,921 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2021-01-06 22:53:00,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2021-01-06 22:53:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:00,922 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:00,922 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:01,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 22:53:01,136 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash 404931329, now seen corresponding path program 27 times [2021-01-06 22:53:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:01,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891186433] [2021-01-06 22:53:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891186433] [2021-01-06 22:53:01,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502464937] [2021-01-06 22:53:01,193 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 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 22:53:01,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:01,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:01,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:01,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582173077] [2021-01-06 22:53:01,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:01,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:01,332 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 13 states. [2021-01-06 22:53:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:01,508 INFO L93 Difference]: Finished difference Result 179 states and 429 transitions. [2021-01-06 22:53:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:01,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:01,511 INFO L225 Difference]: With dead ends: 179 [2021-01-06 22:53:01,511 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 22:53:01,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 22:53:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 132. [2021-01-06 22:53:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 22:53:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 339 transitions. [2021-01-06 22:53:01,517 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 339 transitions. Word has length 12 [2021-01-06 22:53:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:01,517 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 339 transitions. [2021-01-06 22:53:01,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 339 transitions. [2021-01-06 22:53:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:01,518 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:01,518 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:01,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 22:53:01,733 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash 405594419, now seen corresponding path program 28 times [2021-01-06 22:53:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:01,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992462688] [2021-01-06 22:53:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992462688] [2021-01-06 22:53:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587112953] [2021-01-06 22:53:01,795 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 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 22:53:01,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:01,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:01,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:01,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189722621] [2021-01-06 22:53:01,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:01,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:01,934 INFO L87 Difference]: Start difference. First operand 132 states and 339 transitions. Second operand 13 states. [2021-01-06 22:53:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:02,151 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2021-01-06 22:53:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:02,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:02,153 INFO L225 Difference]: With dead ends: 180 [2021-01-06 22:53:02,153 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 22:53:02,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 22:53:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-01-06 22:53:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 346 transitions. [2021-01-06 22:53:02,158 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 346 transitions. Word has length 12 [2021-01-06 22:53:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:02,159 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 346 transitions. [2021-01-06 22:53:02,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 346 transitions. [2021-01-06 22:53:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:02,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:02,160 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:02,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 22:53:02,373 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 405615809, now seen corresponding path program 29 times [2021-01-06 22:53:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:02,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205902649] [2021-01-06 22:53:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:02,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205902649] [2021-01-06 22:53:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525955391] [2021-01-06 22:53:02,433 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 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 22:53:02,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:02,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:02,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:02,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:02,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664694381] [2021-01-06 22:53:02,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:02,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:02,568 INFO L87 Difference]: Start difference. First operand 134 states and 346 transitions. Second operand 13 states. [2021-01-06 22:53:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:02,907 INFO L93 Difference]: Finished difference Result 202 states and 486 transitions. [2021-01-06 22:53:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:02,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:02,909 INFO L225 Difference]: With dead ends: 202 [2021-01-06 22:53:02,909 INFO L226 Difference]: Without dead ends: 194 [2021-01-06 22:53:02,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-06 22:53:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 130. [2021-01-06 22:53:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 22:53:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 332 transitions. [2021-01-06 22:53:02,915 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 332 transitions. Word has length 12 [2021-01-06 22:53:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:02,915 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 332 transitions. [2021-01-06 22:53:02,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 332 transitions. [2021-01-06 22:53:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:02,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:02,916 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:03,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:03,117 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:03,118 INFO L82 PathProgramCache]: Analyzing trace with hash 406776449, now seen corresponding path program 30 times [2021-01-06 22:53:03,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:03,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613522959] [2021-01-06 22:53:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:03,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613522959] [2021-01-06 22:53:03,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603991594] [2021-01-06 22:53:03,173 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 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 22:53:03,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:53:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:03,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:03,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747229788] [2021-01-06 22:53:03,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:03,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:03,324 INFO L87 Difference]: Start difference. First operand 130 states and 332 transitions. Second operand 13 states. [2021-01-06 22:53:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:03,485 INFO L93 Difference]: Finished difference Result 176 states and 422 transitions. [2021-01-06 22:53:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:03,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:03,487 INFO L225 Difference]: With dead ends: 176 [2021-01-06 22:53:03,487 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 22:53:03,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 22:53:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-01-06 22:53:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 22:53:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 327 transitions. [2021-01-06 22:53:03,492 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 327 transitions. Word has length 12 [2021-01-06 22:53:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:03,493 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 327 transitions. [2021-01-06 22:53:03,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 327 transitions. [2021-01-06 22:53:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:03,493 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:03,494 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:03,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 22:53:03,709 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 407381879, now seen corresponding path program 31 times [2021-01-06 22:53:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:03,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505571635] [2021-01-06 22:53:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:03,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505571635] [2021-01-06 22:53:03,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099620551] [2021-01-06 22:53:03,776 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 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 22:53:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:03,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:03,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081990045] [2021-01-06 22:53:03,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:03,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:03,939 INFO L87 Difference]: Start difference. First operand 128 states and 327 transitions. Second operand 13 states. [2021-01-06 22:53:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:04,116 INFO L93 Difference]: Finished difference Result 174 states and 420 transitions. [2021-01-06 22:53:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:53:04,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:04,119 INFO L225 Difference]: With dead ends: 174 [2021-01-06 22:53:04,119 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 22:53:04,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 22:53:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-01-06 22:53:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 22:53:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 334 transitions. [2021-01-06 22:53:04,123 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 334 transitions. Word has length 12 [2021-01-06 22:53:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:04,124 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 334 transitions. [2021-01-06 22:53:04,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 334 transitions. [2021-01-06 22:53:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:04,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:04,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:04,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 22:53:04,339 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash 407401347, now seen corresponding path program 32 times [2021-01-06 22:53:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:04,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855297326] [2021-01-06 22:53:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:04,408 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 22:53:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855297326] [2021-01-06 22:53:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087095907] [2021-01-06 22:53:04,408 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 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 22:53:04,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:04,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:04,555 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 22:53:04,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:04,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:04,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426546241] [2021-01-06 22:53:04,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:04,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:04,558 INFO L87 Difference]: Start difference. First operand 130 states and 334 transitions. Second operand 14 states. [2021-01-06 22:53:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:04,861 INFO L93 Difference]: Finished difference Result 215 states and 509 transitions. [2021-01-06 22:53:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:04,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:04,863 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:04,863 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 22:53:04,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:53:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 22:53:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 126. [2021-01-06 22:53:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 22:53:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 319 transitions. [2021-01-06 22:53:04,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 319 transitions. Word has length 12 [2021-01-06 22:53:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:04,869 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 319 transitions. [2021-01-06 22:53:04,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 319 transitions. [2021-01-06 22:53:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:04,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:04,870 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:05,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:05,083 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:05,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2028657558, now seen corresponding path program 10 times [2021-01-06 22:53:05,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:05,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874705792] [2021-01-06 22:53:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874705792] [2021-01-06 22:53:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649196581] [2021-01-06 22:53:05,160 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 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 22:53:05,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:05,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:05,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:05,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:05,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729975212] [2021-01-06 22:53:05,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:05,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:05,346 INFO L87 Difference]: Start difference. First operand 126 states and 319 transitions. Second operand 15 states. [2021-01-06 22:53:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:05,399 INFO L93 Difference]: Finished difference Result 161 states and 390 transitions. [2021-01-06 22:53:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:53:05,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:05,401 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:53:05,401 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 22:53:05,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 22:53:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-01-06 22:53:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 22:53:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2021-01-06 22:53:05,406 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2021-01-06 22:53:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:05,406 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2021-01-06 22:53:05,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2021-01-06 22:53:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:05,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:05,407 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:05,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 22:53:05,621 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash -584239438, now seen corresponding path program 11 times [2021-01-06 22:53:05,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:05,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25082057] [2021-01-06 22:53:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25082057] [2021-01-06 22:53:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626703740] [2021-01-06 22:53:05,692 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 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 22:53:05,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:05,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:05,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:05,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:05,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322854462] [2021-01-06 22:53:05,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:05,860 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 15 states. [2021-01-06 22:53:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:05,927 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2021-01-06 22:53:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:05,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:05,930 INFO L225 Difference]: With dead ends: 176 [2021-01-06 22:53:05,930 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 22:53:05,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 22:53:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2021-01-06 22:53:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 22:53:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2021-01-06 22:53:05,936 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2021-01-06 22:53:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:05,936 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2021-01-06 22:53:05,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2021-01-06 22:53:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:05,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:05,937 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:06,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:06,141 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash 52990052, now seen corresponding path program 12 times [2021-01-06 22:53:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:06,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493716684] [2021-01-06 22:53:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:06,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493716684] [2021-01-06 22:53:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148610912] [2021-01-06 22:53:06,215 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 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 22:53:06,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:06,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:06,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:53:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:06,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:06,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125811307] [2021-01-06 22:53:06,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:06,366 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 15 states. [2021-01-06 22:53:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:06,439 INFO L93 Difference]: Finished difference Result 175 states and 418 transitions. [2021-01-06 22:53:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:06,440 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:06,441 INFO L225 Difference]: With dead ends: 175 [2021-01-06 22:53:06,442 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 22:53:06,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 22:53:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2021-01-06 22:53:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 340 transitions. [2021-01-06 22:53:06,447 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 340 transitions. Word has length 12 [2021-01-06 22:53:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:06,447 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 340 transitions. [2021-01-06 22:53:06,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 340 transitions. [2021-01-06 22:53:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:06,448 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:06,448 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:06,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 22:53:06,663 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:06,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash 73545842, now seen corresponding path program 13 times [2021-01-06 22:53:06,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:06,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255338426] [2021-01-06 22:53:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:06,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255338426] [2021-01-06 22:53:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505712528] [2021-01-06 22:53:06,742 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 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 22:53:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:06,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216746456] [2021-01-06 22:53:06,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:06,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:06,887 INFO L87 Difference]: Start difference. First operand 134 states and 340 transitions. Second operand 15 states. [2021-01-06 22:53:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:06,978 INFO L93 Difference]: Finished difference Result 174 states and 418 transitions. [2021-01-06 22:53:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:06,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:06,980 INFO L225 Difference]: With dead ends: 174 [2021-01-06 22:53:06,980 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 22:53:06,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 22:53:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-01-06 22:53:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2021-01-06 22:53:06,985 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2021-01-06 22:53:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:06,985 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2021-01-06 22:53:06,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2021-01-06 22:53:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:06,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:06,986 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:07,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 22:53:07,201 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash 74208932, now seen corresponding path program 14 times [2021-01-06 22:53:07,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:07,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947531834] [2021-01-06 22:53:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947531834] [2021-01-06 22:53:07,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834287997] [2021-01-06 22:53:07,274 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 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 22:53:07,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:07,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:53:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:07,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:07,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:07,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928776646] [2021-01-06 22:53:07,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:07,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:07,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:07,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:07,442 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 15 states. [2021-01-06 22:53:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:07,564 INFO L93 Difference]: Finished difference Result 173 states and 418 transitions. [2021-01-06 22:53:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:07,565 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:07,566 INFO L225 Difference]: With dead ends: 173 [2021-01-06 22:53:07,566 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 22:53:07,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 22:53:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 138. [2021-01-06 22:53:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 22:53:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 354 transitions. [2021-01-06 22:53:07,572 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 354 transitions. Word has length 12 [2021-01-06 22:53:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:07,572 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 354 transitions. [2021-01-06 22:53:07,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 354 transitions. [2021-01-06 22:53:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:07,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:07,573 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:07,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 22:53:07,786 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash 74230322, now seen corresponding path program 15 times [2021-01-06 22:53:07,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:07,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159552101] [2021-01-06 22:53:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:07,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159552101] [2021-01-06 22:53:07,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366640674] [2021-01-06 22:53:07,855 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 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 22:53:07,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:07,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:08,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511667292] [2021-01-06 22:53:08,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:08,032 INFO L87 Difference]: Start difference. First operand 138 states and 354 transitions. Second operand 15 states. [2021-01-06 22:53:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:08,206 INFO L93 Difference]: Finished difference Result 182 states and 442 transitions. [2021-01-06 22:53:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:08,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2021-01-06 22:53:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:08,208 INFO L225 Difference]: With dead ends: 182 [2021-01-06 22:53:08,208 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 22:53:08,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 22:53:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-01-06 22:53:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 352 transitions. [2021-01-06 22:53:08,212 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 352 transitions. Word has length 12 [2021-01-06 22:53:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:08,212 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 352 transitions. [2021-01-06 22:53:08,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 352 transitions. [2021-01-06 22:53:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:08,213 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:08,213 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:08,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-06 22:53:08,429 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1977266529, now seen corresponding path program 4 times [2021-01-06 22:53:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:08,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541648317] [2021-01-06 22:53:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:08,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541648317] [2021-01-06 22:53:08,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445410093] [2021-01-06 22:53:08,512 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 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 22:53:08,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:08,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:08,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:08,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:08,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83451243] [2021-01-06 22:53:08,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:08,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:08,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:08,741 INFO L87 Difference]: Start difference. First operand 136 states and 352 transitions. Second operand 18 states. [2021-01-06 22:53:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:08,927 INFO L93 Difference]: Finished difference Result 211 states and 513 transitions. [2021-01-06 22:53:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:08,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2021-01-06 22:53:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:08,929 INFO L225 Difference]: With dead ends: 211 [2021-01-06 22:53:08,930 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 22:53:08,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 22:53:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 146. [2021-01-06 22:53:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 22:53:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2021-01-06 22:53:08,934 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 13 [2021-01-06 22:53:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:08,935 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2021-01-06 22:53:08,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2021-01-06 22:53:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:08,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:08,935 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:09,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:09,136 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1447090257, now seen corresponding path program 33 times [2021-01-06 22:53:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:09,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644785887] [2021-01-06 22:53:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:09,214 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 22:53:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644785887] [2021-01-06 22:53:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348416931] [2021-01-06 22:53:09,215 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 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 22:53:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:53:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:09,306 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 22:53:09,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:09,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 22:53:09,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025770431] [2021-01-06 22:53:09,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:53:09,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:53:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:53:09,308 INFO L87 Difference]: Start difference. First operand 146 states and 384 transitions. Second operand 11 states. [2021-01-06 22:53:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:09,411 INFO L93 Difference]: Finished difference Result 180 states and 450 transitions. [2021-01-06 22:53:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:09,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 22:53:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:09,412 INFO L225 Difference]: With dead ends: 180 [2021-01-06 22:53:09,412 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 22:53:09,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 22:53:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-01-06 22:53:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 22:53:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2021-01-06 22:53:09,415 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 13 [2021-01-06 22:53:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:09,415 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2021-01-06 22:53:09,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:53:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2021-01-06 22:53:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:09,416 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:09,416 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:09,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 22:53:09,628 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1447371117, now seen corresponding path program 34 times [2021-01-06 22:53:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:09,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830519628] [2021-01-06 22:53:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:09,713 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 22:53:09,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830519628] [2021-01-06 22:53:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488042992] [2021-01-06 22:53:09,714 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 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 22:53:09,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:09,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:09,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:09,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:09,894 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 22:53:09,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:09,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:09,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467715844] [2021-01-06 22:53:09,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:09,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:09,896 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 16 states. [2021-01-06 22:53:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:10,257 INFO L93 Difference]: Finished difference Result 246 states and 598 transitions. [2021-01-06 22:53:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:10,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:10,261 INFO L225 Difference]: With dead ends: 246 [2021-01-06 22:53:10,262 INFO L226 Difference]: Without dead ends: 234 [2021-01-06 22:53:10,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-01-06 22:53:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 145. [2021-01-06 22:53:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 22:53:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 388 transitions. [2021-01-06 22:53:10,271 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 388 transitions. Word has length 13 [2021-01-06 22:53:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:10,271 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 388 transitions. [2021-01-06 22:53:10,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 388 transitions. [2021-01-06 22:53:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:10,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:10,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:10,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:10,483 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1985942897, now seen corresponding path program 35 times [2021-01-06 22:53:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:10,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19560096] [2021-01-06 22:53:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:10,554 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 22:53:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19560096] [2021-01-06 22:53:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881973992] [2021-01-06 22:53:10,554 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 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 22:53:10,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:10,784 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 22:53:10,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:10,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:10,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615777959] [2021-01-06 22:53:10,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:10,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:10,792 INFO L87 Difference]: Start difference. First operand 145 states and 388 transitions. Second operand 16 states. [2021-01-06 22:53:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:11,027 INFO L93 Difference]: Finished difference Result 203 states and 500 transitions. [2021-01-06 22:53:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:11,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:11,030 INFO L225 Difference]: With dead ends: 203 [2021-01-06 22:53:11,030 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 22:53:11,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 22:53:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 149. [2021-01-06 22:53:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 22:53:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 394 transitions. [2021-01-06 22:53:11,033 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 394 transitions. Word has length 13 [2021-01-06 22:53:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:11,034 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 394 transitions. [2021-01-06 22:53:11,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 394 transitions. [2021-01-06 22:53:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:11,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:11,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:11,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 22:53:11,240 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1716036437, now seen corresponding path program 36 times [2021-01-06 22:53:11,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:11,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652547317] [2021-01-06 22:53:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:11,313 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 22:53:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652547317] [2021-01-06 22:53:11,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114319770] [2021-01-06 22:53:11,314 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 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 22:53:11,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:53:11,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:11,507 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 22:53:11,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:11,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:11,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902595939] [2021-01-06 22:53:11,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:11,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:11,508 INFO L87 Difference]: Start difference. First operand 149 states and 394 transitions. Second operand 16 states. [2021-01-06 22:53:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:11,782 INFO L93 Difference]: Finished difference Result 218 states and 527 transitions. [2021-01-06 22:53:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:11,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:11,783 INFO L225 Difference]: With dead ends: 218 [2021-01-06 22:53:11,783 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 22:53:11,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 22:53:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 151. [2021-01-06 22:53:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 22:53:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 401 transitions. [2021-01-06 22:53:11,787 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 401 transitions. Word has length 13 [2021-01-06 22:53:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 401 transitions. [2021-01-06 22:53:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 401 transitions. [2021-01-06 22:53:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:11,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:11,788 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:11,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 22:53:11,989 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1715431007, now seen corresponding path program 37 times [2021-01-06 22:53:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:11,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581438506] [2021-01-06 22:53:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:12,060 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 22:53:12,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581438506] [2021-01-06 22:53:12,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21111428] [2021-01-06 22:53:12,061 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 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 22:53:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:12,253 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 22:53:12,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:12,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:12,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025562134] [2021-01-06 22:53:12,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:12,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:12,255 INFO L87 Difference]: Start difference. First operand 151 states and 401 transitions. Second operand 16 states. [2021-01-06 22:53:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:12,596 INFO L93 Difference]: Finished difference Result 215 states and 529 transitions. [2021-01-06 22:53:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:53:12,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:12,598 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:12,598 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:12,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:53:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 154. [2021-01-06 22:53:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 413 transitions. [2021-01-06 22:53:12,602 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 413 transitions. Word has length 13 [2021-01-06 22:53:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:12,602 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 413 transitions. [2021-01-06 22:53:12,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 413 transitions. [2021-01-06 22:53:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:12,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:12,603 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:12,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:12,817 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1715411539, now seen corresponding path program 38 times [2021-01-06 22:53:12,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:12,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020196322] [2021-01-06 22:53:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:12,892 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 22:53:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020196322] [2021-01-06 22:53:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671586697] [2021-01-06 22:53:12,893 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 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 22:53:12,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:12,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:13,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:13,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:13,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:13,079 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 22:53:13,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:13,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:13,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571268594] [2021-01-06 22:53:13,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:13,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:13,081 INFO L87 Difference]: Start difference. First operand 154 states and 413 transitions. Second operand 16 states. [2021-01-06 22:53:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:13,608 INFO L93 Difference]: Finished difference Result 253 states and 615 transitions. [2021-01-06 22:53:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:53:13,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:13,610 INFO L225 Difference]: With dead ends: 253 [2021-01-06 22:53:13,610 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 22:53:13,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:53:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 22:53:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 145. [2021-01-06 22:53:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 22:53:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 388 transitions. [2021-01-06 22:53:13,613 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 388 transitions. Word has length 13 [2021-01-06 22:53:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:13,613 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 388 transitions. [2021-01-06 22:53:13,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 388 transitions. [2021-01-06 22:53:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:13,615 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:13,615 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:13,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 22:53:13,821 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2021527201, now seen corresponding path program 39 times [2021-01-06 22:53:13,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:13,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024929711] [2021-01-06 22:53:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:13,909 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 22:53:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024929711] [2021-01-06 22:53:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860840918] [2021-01-06 22:53:13,911 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 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 22:53:13,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:14,086 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 22:53:14,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:14,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:14,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834681172] [2021-01-06 22:53:14,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:14,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:14,088 INFO L87 Difference]: Start difference. First operand 145 states and 388 transitions. Second operand 16 states. [2021-01-06 22:53:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:14,323 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2021-01-06 22:53:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:14,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:14,325 INFO L225 Difference]: With dead ends: 210 [2021-01-06 22:53:14,325 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 22:53:14,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 22:53:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 151. [2021-01-06 22:53:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 22:53:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 398 transitions. [2021-01-06 22:53:14,329 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 398 transitions. Word has length 13 [2021-01-06 22:53:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:14,329 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 398 transitions. [2021-01-06 22:53:14,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 398 transitions. [2021-01-06 22:53:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:14,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:14,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:14,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 22:53:14,537 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2021584861, now seen corresponding path program 40 times [2021-01-06 22:53:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:14,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123667887] [2021-01-06 22:53:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:14,612 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 22:53:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123667887] [2021-01-06 22:53:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112706191] [2021-01-06 22:53:14,613 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 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 22:53:14,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:14,799 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 22:53:14,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:14,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:14,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218543825] [2021-01-06 22:53:14,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:14,801 INFO L87 Difference]: Start difference. First operand 151 states and 398 transitions. Second operand 16 states. [2021-01-06 22:53:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:15,081 INFO L93 Difference]: Finished difference Result 203 states and 502 transitions. [2021-01-06 22:53:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:15,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:15,083 INFO L225 Difference]: With dead ends: 203 [2021-01-06 22:53:15,083 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 22:53:15,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 22:53:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2021-01-06 22:53:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 22:53:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 398 transitions. [2021-01-06 22:53:15,087 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 398 transitions. Word has length 13 [2021-01-06 22:53:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:15,087 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 398 transitions. [2021-01-06 22:53:15,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 398 transitions. [2021-01-06 22:53:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:15,088 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:15,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:15,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 22:53:15,291 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1798692869, now seen corresponding path program 41 times [2021-01-06 22:53:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:15,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384866034] [2021-01-06 22:53:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:15,372 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 22:53:15,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384866034] [2021-01-06 22:53:15,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308655218] [2021-01-06 22:53:15,373 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 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 22:53:15,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:15,546 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 22:53:15,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:15,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:15,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965425936] [2021-01-06 22:53:15,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:15,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:15,548 INFO L87 Difference]: Start difference. First operand 151 states and 398 transitions. Second operand 16 states. [2021-01-06 22:53:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:15,822 INFO L93 Difference]: Finished difference Result 224 states and 545 transitions. [2021-01-06 22:53:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:15,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:15,824 INFO L225 Difference]: With dead ends: 224 [2021-01-06 22:53:15,824 INFO L226 Difference]: Without dead ends: 222 [2021-01-06 22:53:15,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-01-06 22:53:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2021-01-06 22:53:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 408 transitions. [2021-01-06 22:53:15,828 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 408 transitions. Word has length 13 [2021-01-06 22:53:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:15,828 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 408 transitions. [2021-01-06 22:53:15,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 408 transitions. [2021-01-06 22:53:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:15,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:15,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:16,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:16,034 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1798750529, now seen corresponding path program 42 times [2021-01-06 22:53:16,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754304579] [2021-01-06 22:53:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:16,102 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 22:53:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754304579] [2021-01-06 22:53:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805546753] [2021-01-06 22:53:16,102 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 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 22:53:16,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:16,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:16,272 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 22:53:16,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:16,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:16,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149120954] [2021-01-06 22:53:16,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:16,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:16,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:16,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:16,279 INFO L87 Difference]: Start difference. First operand 154 states and 408 transitions. Second operand 16 states. [2021-01-06 22:53:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:16,538 INFO L93 Difference]: Finished difference Result 215 states and 528 transitions. [2021-01-06 22:53:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:16,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:16,541 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:16,541 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:16,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 153. [2021-01-06 22:53:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 22:53:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 405 transitions. [2021-01-06 22:53:16,546 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 405 transitions. Word has length 13 [2021-01-06 22:53:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:16,546 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 405 transitions. [2021-01-06 22:53:16,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 405 transitions. [2021-01-06 22:53:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:16,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:16,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:16,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:16,760 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1817461199, now seen corresponding path program 43 times [2021-01-06 22:53:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:16,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747121303] [2021-01-06 22:53:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:16,835 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 22:53:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747121303] [2021-01-06 22:53:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855670292] [2021-01-06 22:53:16,836 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 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 22:53:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:17,010 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 22:53:17,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:17,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:17,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115890933] [2021-01-06 22:53:17,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:17,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:17,012 INFO L87 Difference]: Start difference. First operand 153 states and 405 transitions. Second operand 16 states. [2021-01-06 22:53:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:17,393 INFO L93 Difference]: Finished difference Result 224 states and 542 transitions. [2021-01-06 22:53:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:17,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:17,396 INFO L225 Difference]: With dead ends: 224 [2021-01-06 22:53:17,396 INFO L226 Difference]: Without dead ends: 222 [2021-01-06 22:53:17,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-01-06 22:53:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2021-01-06 22:53:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2021-01-06 22:53:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 417 transitions. [2021-01-06 22:53:17,401 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 417 transitions. Word has length 13 [2021-01-06 22:53:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:17,401 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 417 transitions. [2021-01-06 22:53:17,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 417 transitions. [2021-01-06 22:53:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:17,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:17,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:17,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:17,615 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1818124289, now seen corresponding path program 44 times [2021-01-06 22:53:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:17,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937711876] [2021-01-06 22:53:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:17,698 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 22:53:17,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937711876] [2021-01-06 22:53:17,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839185092] [2021-01-06 22:53:17,698 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 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 22:53:17,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:17,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:17,865 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 22:53:17,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:17,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:17,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913772007] [2021-01-06 22:53:17,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:17,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:17,875 INFO L87 Difference]: Start difference. First operand 156 states and 417 transitions. Second operand 16 states. [2021-01-06 22:53:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:18,316 INFO L93 Difference]: Finished difference Result 225 states and 549 transitions. [2021-01-06 22:53:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:18,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:18,319 INFO L225 Difference]: With dead ends: 225 [2021-01-06 22:53:18,319 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 22:53:18,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 22:53:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 158. [2021-01-06 22:53:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2021-01-06 22:53:18,324 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2021-01-06 22:53:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:18,324 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2021-01-06 22:53:18,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2021-01-06 22:53:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:18,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:18,325 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:18,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:18,527 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1818143757, now seen corresponding path program 45 times [2021-01-06 22:53:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:18,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995740944] [2021-01-06 22:53:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:18,627 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 22:53:18,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995740944] [2021-01-06 22:53:18,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027518735] [2021-01-06 22:53:18,627 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 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 22:53:18,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:18,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:18,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:18,782 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 22:53:18,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:18,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952105774] [2021-01-06 22:53:18,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:18,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:18,784 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 16 states. [2021-01-06 22:53:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:19,398 INFO L93 Difference]: Finished difference Result 273 states and 663 transitions. [2021-01-06 22:53:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:53:19,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:19,400 INFO L225 Difference]: With dead ends: 273 [2021-01-06 22:53:19,400 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 22:53:19,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:53:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 22:53:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 154. [2021-01-06 22:53:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 414 transitions. [2021-01-06 22:53:19,404 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 414 transitions. Word has length 13 [2021-01-06 22:53:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:19,404 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 414 transitions. [2021-01-06 22:53:19,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 414 transitions. [2021-01-06 22:53:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:19,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:19,405 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:19,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 22:53:19,619 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1698987151, now seen corresponding path program 46 times [2021-01-06 22:53:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:19,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828772106] [2021-01-06 22:53:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:19,703 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 22:53:19,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828772106] [2021-01-06 22:53:19,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682125054] [2021-01-06 22:53:19,703 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 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 22:53:19,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:19,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:19,867 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 22:53:19,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:19,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:19,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257485279] [2021-01-06 22:53:19,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:19,869 INFO L87 Difference]: Start difference. First operand 154 states and 414 transitions. Second operand 16 states. [2021-01-06 22:53:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:20,051 INFO L93 Difference]: Finished difference Result 201 states and 512 transitions. [2021-01-06 22:53:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:20,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:20,054 INFO L225 Difference]: With dead ends: 201 [2021-01-06 22:53:20,054 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 22:53:20,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 22:53:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2021-01-06 22:53:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 422 transitions. [2021-01-06 22:53:20,060 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 422 transitions. Word has length 13 [2021-01-06 22:53:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:20,060 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 422 transitions. [2021-01-06 22:53:20,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 422 transitions. [2021-01-06 22:53:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:20,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:20,061 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:20,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:20,273 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1698989073, now seen corresponding path program 47 times [2021-01-06 22:53:20,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:20,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728433902] [2021-01-06 22:53:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:20,343 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 22:53:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728433902] [2021-01-06 22:53:20,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178743989] [2021-01-06 22:53:20,344 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 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 22:53:20,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:20,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:20,548 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 22:53:20,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:20,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:20,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703944555] [2021-01-06 22:53:20,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:20,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:20,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:20,551 INFO L87 Difference]: Start difference. First operand 157 states and 422 transitions. Second operand 16 states. [2021-01-06 22:53:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:20,787 INFO L93 Difference]: Finished difference Result 210 states and 530 transitions. [2021-01-06 22:53:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:20,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:20,790 INFO L225 Difference]: With dead ends: 210 [2021-01-06 22:53:20,790 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 22:53:20,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 22:53:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2021-01-06 22:53:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 427 transitions. [2021-01-06 22:53:20,796 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 427 transitions. Word has length 13 [2021-01-06 22:53:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:20,796 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 427 transitions. [2021-01-06 22:53:20,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 427 transitions. [2021-01-06 22:53:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:20,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:20,797 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:21,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 22:53:21,010 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1700893775, now seen corresponding path program 48 times [2021-01-06 22:53:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221543971] [2021-01-06 22:53:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:21,088 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 22:53:21,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221543971] [2021-01-06 22:53:21,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807954526] [2021-01-06 22:53:21,089 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 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 22:53:21,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:21,282 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 22:53:21,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:21,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976810219] [2021-01-06 22:53:21,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:21,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:21,284 INFO L87 Difference]: Start difference. First operand 159 states and 427 transitions. Second operand 16 states. [2021-01-06 22:53:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:21,437 INFO L93 Difference]: Finished difference Result 200 states and 511 transitions. [2021-01-06 22:53:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:21,438 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:21,439 INFO L225 Difference]: With dead ends: 200 [2021-01-06 22:53:21,439 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 22:53:21,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 22:53:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-01-06 22:53:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2021-01-06 22:53:21,444 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2021-01-06 22:53:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:21,444 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2021-01-06 22:53:21,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2021-01-06 22:53:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:21,445 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:21,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:21,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:21,654 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash -913909845, now seen corresponding path program 49 times [2021-01-06 22:53:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:21,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952975334] [2021-01-06 22:53:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:21,731 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 22:53:21,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952975334] [2021-01-06 22:53:21,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4740673] [2021-01-06 22:53:21,732 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 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 22:53:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:21,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:21,908 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 22:53:21,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:21,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:21,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410632185] [2021-01-06 22:53:21,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:21,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:21,910 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2021-01-06 22:53:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:22,099 INFO L93 Difference]: Finished difference Result 216 states and 540 transitions. [2021-01-06 22:53:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:22,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:22,102 INFO L225 Difference]: With dead ends: 216 [2021-01-06 22:53:22,102 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 22:53:22,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 22:53:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 160. [2021-01-06 22:53:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 22:53:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 429 transitions. [2021-01-06 22:53:22,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 429 transitions. Word has length 13 [2021-01-06 22:53:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:22,107 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 429 transitions. [2021-01-06 22:53:22,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 429 transitions. [2021-01-06 22:53:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:22,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:22,108 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:22,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 22:53:22,308 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -913907923, now seen corresponding path program 50 times [2021-01-06 22:53:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:22,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004030453] [2021-01-06 22:53:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:22,380 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 22:53:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004030453] [2021-01-06 22:53:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688960787] [2021-01-06 22:53:22,381 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 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 22:53:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:22,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:22,567 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 22:53:22,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:22,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758563585] [2021-01-06 22:53:22,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:22,569 INFO L87 Difference]: Start difference. First operand 160 states and 429 transitions. Second operand 16 states. [2021-01-06 22:53:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:22,869 INFO L93 Difference]: Finished difference Result 227 states and 562 transitions. [2021-01-06 22:53:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:22,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:22,872 INFO L225 Difference]: With dead ends: 227 [2021-01-06 22:53:22,872 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 22:53:22,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 22:53:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2021-01-06 22:53:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 431 transitions. [2021-01-06 22:53:22,877 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 431 transitions. Word has length 13 [2021-01-06 22:53:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:22,877 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 431 transitions. [2021-01-06 22:53:22,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 431 transitions. [2021-01-06 22:53:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:22,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:22,878 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:23,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:23,085 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -912003221, now seen corresponding path program 51 times [2021-01-06 22:53:23,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:23,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82118759] [2021-01-06 22:53:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:23,155 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 22:53:23,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82118759] [2021-01-06 22:53:23,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373371428] [2021-01-06 22:53:23,156 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 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 22:53:23,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:23,337 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 22:53:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956878063] [2021-01-06 22:53:23,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:23,339 INFO L87 Difference]: Start difference. First operand 161 states and 431 transitions. Second operand 16 states. [2021-01-06 22:53:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:23,518 INFO L93 Difference]: Finished difference Result 212 states and 532 transitions. [2021-01-06 22:53:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:53:23,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:23,521 INFO L225 Difference]: With dead ends: 212 [2021-01-06 22:53:23,521 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 22:53:23,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 22:53:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 157. [2021-01-06 22:53:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2021-01-06 22:53:23,526 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2021-01-06 22:53:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:23,527 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2021-01-06 22:53:23,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2021-01-06 22:53:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:23,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:23,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:23,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:23,742 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash -332091615, now seen corresponding path program 52 times [2021-01-06 22:53:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174508784] [2021-01-06 22:53:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:23,811 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 22:53:23,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174508784] [2021-01-06 22:53:23,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565178363] [2021-01-06 22:53:23,811 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 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 22:53:23,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:23,992 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 22:53:23,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:23,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:23,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934760021] [2021-01-06 22:53:23,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:23,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:23,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:23,994 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2021-01-06 22:53:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:24,217 INFO L93 Difference]: Finished difference Result 216 states and 538 transitions. [2021-01-06 22:53:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:24,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:24,220 INFO L225 Difference]: With dead ends: 216 [2021-01-06 22:53:24,220 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 22:53:24,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 22:53:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2021-01-06 22:53:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2021-01-06 22:53:24,224 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2021-01-06 22:53:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:24,224 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2021-01-06 22:53:24,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2021-01-06 22:53:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:24,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:24,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:24,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 22:53:24,439 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash -332089693, now seen corresponding path program 53 times [2021-01-06 22:53:24,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:24,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719397506] [2021-01-06 22:53:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:24,506 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 22:53:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719397506] [2021-01-06 22:53:24,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701347238] [2021-01-06 22:53:24,507 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 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 22:53:24,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:24,696 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 22:53:24,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:24,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:24,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037198627] [2021-01-06 22:53:24,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:24,697 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 16 states. [2021-01-06 22:53:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:24,973 INFO L93 Difference]: Finished difference Result 232 states and 567 transitions. [2021-01-06 22:53:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:24,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:24,975 INFO L225 Difference]: With dead ends: 232 [2021-01-06 22:53:24,976 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 22:53:24,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 22:53:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 158. [2021-01-06 22:53:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 423 transitions. [2021-01-06 22:53:24,980 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 423 transitions. Word has length 13 [2021-01-06 22:53:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:24,980 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 423 transitions. [2021-01-06 22:53:24,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 423 transitions. [2021-01-06 22:53:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:24,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:24,981 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:25,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:25,182 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -313323285, now seen corresponding path program 54 times [2021-01-06 22:53:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:25,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750247356] [2021-01-06 22:53:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:25,244 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 22:53:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750247356] [2021-01-06 22:53:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728997776] [2021-01-06 22:53:25,245 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 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 22:53:25,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:25,426 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 22:53:25,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071766551] [2021-01-06 22:53:25,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:25,429 INFO L87 Difference]: Start difference. First operand 158 states and 423 transitions. Second operand 16 states. [2021-01-06 22:53:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:25,694 INFO L93 Difference]: Finished difference Result 225 states and 555 transitions. [2021-01-06 22:53:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:53:25,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:25,696 INFO L225 Difference]: With dead ends: 225 [2021-01-06 22:53:25,697 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 22:53:25,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:53:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 22:53:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 159. [2021-01-06 22:53:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 428 transitions. [2021-01-06 22:53:25,702 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 428 transitions. Word has length 13 [2021-01-06 22:53:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:25,702 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 428 transitions. [2021-01-06 22:53:25,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 428 transitions. [2021-01-06 22:53:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:25,703 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:25,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:25,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:25,918 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash -313321363, now seen corresponding path program 55 times [2021-01-06 22:53:25,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:25,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748461596] [2021-01-06 22:53:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:25,986 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 22:53:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748461596] [2021-01-06 22:53:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223108611] [2021-01-06 22:53:25,986 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 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 22:53:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:26,164 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 22:53:26,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:26,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141216739] [2021-01-06 22:53:26,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:26,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:26,167 INFO L87 Difference]: Start difference. First operand 159 states and 428 transitions. Second operand 16 states. [2021-01-06 22:53:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:26,561 INFO L93 Difference]: Finished difference Result 236 states and 578 transitions. [2021-01-06 22:53:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:53:26,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:26,563 INFO L225 Difference]: With dead ends: 236 [2021-01-06 22:53:26,563 INFO L226 Difference]: Without dead ends: 234 [2021-01-06 22:53:26,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-01-06 22:53:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 161. [2021-01-06 22:53:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 435 transitions. [2021-01-06 22:53:26,567 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 435 transitions. Word has length 13 [2021-01-06 22:53:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:26,568 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 435 transitions. [2021-01-06 22:53:26,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 435 transitions. [2021-01-06 22:53:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:26,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:26,568 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:26,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 22:53:26,784 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -312717855, now seen corresponding path program 56 times [2021-01-06 22:53:26,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:26,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542665435] [2021-01-06 22:53:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:26,849 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 22:53:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542665435] [2021-01-06 22:53:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278330655] [2021-01-06 22:53:26,849 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 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 22:53:26,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:27,024 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 22:53:27,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:27,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:27,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137311861] [2021-01-06 22:53:27,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:27,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:27,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:27,026 INFO L87 Difference]: Start difference. First operand 161 states and 435 transitions. Second operand 16 states. [2021-01-06 22:53:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:27,357 INFO L93 Difference]: Finished difference Result 218 states and 540 transitions. [2021-01-06 22:53:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:27,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:27,359 INFO L225 Difference]: With dead ends: 218 [2021-01-06 22:53:27,359 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 22:53:27,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 22:53:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 163. [2021-01-06 22:53:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 22:53:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 442 transitions. [2021-01-06 22:53:27,364 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 442 transitions. Word has length 13 [2021-01-06 22:53:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:27,365 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 442 transitions. [2021-01-06 22:53:27,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 442 transitions. [2021-01-06 22:53:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:27,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:27,366 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:27,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:27,566 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash -312698387, now seen corresponding path program 57 times [2021-01-06 22:53:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:27,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605098827] [2021-01-06 22:53:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:27,641 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 22:53:27,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605098827] [2021-01-06 22:53:27,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038508113] [2021-01-06 22:53:27,642 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 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 22:53:27,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:27,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:53:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:27,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:27,812 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 22:53:27,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:27,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:27,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349178730] [2021-01-06 22:53:27,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:27,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:27,814 INFO L87 Difference]: Start difference. First operand 163 states and 442 transitions. Second operand 16 states. [2021-01-06 22:53:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:28,241 INFO L93 Difference]: Finished difference Result 258 states and 629 transitions. [2021-01-06 22:53:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:28,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:28,244 INFO L225 Difference]: With dead ends: 258 [2021-01-06 22:53:28,244 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 22:53:28,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:53:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 22:53:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 163. [2021-01-06 22:53:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 22:53:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 439 transitions. [2021-01-06 22:53:28,249 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 439 transitions. Word has length 13 [2021-01-06 22:53:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:28,249 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 439 transitions. [2021-01-06 22:53:28,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 439 transitions. [2021-01-06 22:53:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:28,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:28,250 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:28,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 22:53:28,451 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash -312658273, now seen corresponding path program 58 times [2021-01-06 22:53:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:28,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069132997] [2021-01-06 22:53:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:28,519 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 22:53:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069132997] [2021-01-06 22:53:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378689026] [2021-01-06 22:53:28,520 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 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 22:53:28,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:28,710 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 22:53:28,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:28,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312673280] [2021-01-06 22:53:28,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:28,712 INFO L87 Difference]: Start difference. First operand 163 states and 439 transitions. Second operand 16 states. [2021-01-06 22:53:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:29,210 INFO L93 Difference]: Finished difference Result 243 states and 596 transitions. [2021-01-06 22:53:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:29,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:29,212 INFO L225 Difference]: With dead ends: 243 [2021-01-06 22:53:29,212 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 22:53:29,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 22:53:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2021-01-06 22:53:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 22:53:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 451 transitions. [2021-01-06 22:53:29,217 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 451 transitions. Word has length 13 [2021-01-06 22:53:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:29,217 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 451 transitions. [2021-01-06 22:53:29,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 451 transitions. [2021-01-06 22:53:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:29,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:29,218 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:29,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 22:53:29,434 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash -312638805, now seen corresponding path program 59 times [2021-01-06 22:53:29,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:29,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292338821] [2021-01-06 22:53:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:29,519 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 22:53:29,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292338821] [2021-01-06 22:53:29,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922735062] [2021-01-06 22:53:29,519 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 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 22:53:29,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:29,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:29,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:29,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:29,704 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 22:53:29,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:29,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:29,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5099984] [2021-01-06 22:53:29,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:29,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:29,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:29,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:29,706 INFO L87 Difference]: Start difference. First operand 166 states and 451 transitions. Second operand 16 states. [2021-01-06 22:53:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:30,409 INFO L93 Difference]: Finished difference Result 291 states and 701 transitions. [2021-01-06 22:53:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:53:30,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:30,412 INFO L225 Difference]: With dead ends: 291 [2021-01-06 22:53:30,412 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 22:53:30,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=939, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:53:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 22:53:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 165. [2021-01-06 22:53:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 22:53:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 444 transitions. [2021-01-06 22:53:30,416 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 444 transitions. Word has length 13 [2021-01-06 22:53:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:30,416 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 444 transitions. [2021-01-06 22:53:30,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 444 transitions. [2021-01-06 22:53:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:30,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:30,417 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:30,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 22:53:30,618 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -310789841, now seen corresponding path program 60 times [2021-01-06 22:53:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838512477] [2021-01-06 22:53:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:30,688 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 22:53:30,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838512477] [2021-01-06 22:53:30,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694808877] [2021-01-06 22:53:30,689 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 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 22:53:30,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:30,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:30,862 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 22:53:30,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623116839] [2021-01-06 22:53:30,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:30,864 INFO L87 Difference]: Start difference. First operand 165 states and 444 transitions. Second operand 16 states. [2021-01-06 22:53:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:31,456 INFO L93 Difference]: Finished difference Result 297 states and 713 transitions. [2021-01-06 22:53:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:53:31,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:31,459 INFO L225 Difference]: With dead ends: 297 [2021-01-06 22:53:31,459 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 22:53:31,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=923, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:53:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 22:53:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 161. [2021-01-06 22:53:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 431 transitions. [2021-01-06 22:53:31,465 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 431 transitions. Word has length 13 [2021-01-06 22:53:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:31,465 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 431 transitions. [2021-01-06 22:53:31,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 431 transitions. [2021-01-06 22:53:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:31,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:31,466 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:31,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:31,667 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash -274773731, now seen corresponding path program 61 times [2021-01-06 22:53:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988202135] [2021-01-06 22:53:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:31,734 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 22:53:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988202135] [2021-01-06 22:53:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484511965] [2021-01-06 22:53:31,734 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 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 22:53:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:31,905 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 22:53:31,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:31,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:31,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892192896] [2021-01-06 22:53:31,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:31,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:31,907 INFO L87 Difference]: Start difference. First operand 161 states and 431 transitions. Second operand 16 states. [2021-01-06 22:53:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:32,095 INFO L93 Difference]: Finished difference Result 220 states and 554 transitions. [2021-01-06 22:53:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:32,096 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:32,098 INFO L225 Difference]: With dead ends: 220 [2021-01-06 22:53:32,098 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 22:53:32,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 22:53:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 159. [2021-01-06 22:53:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2021-01-06 22:53:32,101 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2021-01-06 22:53:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:32,102 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2021-01-06 22:53:32,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2021-01-06 22:53:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:32,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:32,103 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:32,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:32,316 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash -254217941, now seen corresponding path program 62 times [2021-01-06 22:53:32,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:32,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185860134] [2021-01-06 22:53:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:32,390 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 22:53:32,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185860134] [2021-01-06 22:53:32,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014126042] [2021-01-06 22:53:32,390 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 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 22:53:32,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:32,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:32,590 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 22:53:32,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:32,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:32,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107486634] [2021-01-06 22:53:32,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:32,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:32,591 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2021-01-06 22:53:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:32,829 INFO L93 Difference]: Finished difference Result 221 states and 556 transitions. [2021-01-06 22:53:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:32,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:32,831 INFO L225 Difference]: With dead ends: 221 [2021-01-06 22:53:32,831 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 22:53:32,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 22:53:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-01-06 22:53:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 429 transitions. [2021-01-06 22:53:32,835 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 429 transitions. Word has length 13 [2021-01-06 22:53:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:32,836 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 429 transitions. [2021-01-06 22:53:32,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 429 transitions. [2021-01-06 22:53:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:32,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:32,836 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:33,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:33,037 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash -253612511, now seen corresponding path program 63 times [2021-01-06 22:53:33,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:33,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045857575] [2021-01-06 22:53:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:33,113 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 22:53:33,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045857575] [2021-01-06 22:53:33,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529866001] [2021-01-06 22:53:33,114 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 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 22:53:33,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:33,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:33,310 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 22:53:33,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:33,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273102316] [2021-01-06 22:53:33,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:33,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:33,311 INFO L87 Difference]: Start difference. First operand 159 states and 429 transitions. Second operand 16 states. [2021-01-06 22:53:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:33,592 INFO L93 Difference]: Finished difference Result 217 states and 551 transitions. [2021-01-06 22:53:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:33,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:33,594 INFO L225 Difference]: With dead ends: 217 [2021-01-06 22:53:33,595 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 22:53:33,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 22:53:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 161. [2021-01-06 22:53:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 436 transitions. [2021-01-06 22:53:33,598 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 436 transitions. Word has length 13 [2021-01-06 22:53:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:33,598 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 436 transitions. [2021-01-06 22:53:33,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 436 transitions. [2021-01-06 22:53:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:33,599 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:33,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:33,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:33,815 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash -253593043, now seen corresponding path program 64 times [2021-01-06 22:53:33,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:33,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594374958] [2021-01-06 22:53:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:33,899 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 22:53:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594374958] [2021-01-06 22:53:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625579294] [2021-01-06 22:53:33,899 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 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 22:53:33,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:33,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:34,061 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:34,082 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 22:53:34,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:34,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879327094] [2021-01-06 22:53:34,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:34,083 INFO L87 Difference]: Start difference. First operand 161 states and 436 transitions. Second operand 16 states. [2021-01-06 22:53:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:34,500 INFO L93 Difference]: Finished difference Result 276 states and 673 transitions. [2021-01-06 22:53:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:34,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:34,503 INFO L225 Difference]: With dead ends: 276 [2021-01-06 22:53:34,503 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 22:53:34,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 22:53:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 158. [2021-01-06 22:53:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2021-01-06 22:53:34,508 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2021-01-06 22:53:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:34,508 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2021-01-06 22:53:34,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2021-01-06 22:53:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:34,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:34,509 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:34,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-06 22:53:34,723 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1536124564, now seen corresponding path program 16 times [2021-01-06 22:53:34,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:34,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237046923] [2021-01-06 22:53:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237046923] [2021-01-06 22:53:34,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460556117] [2021-01-06 22:53:34,828 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 22:53:34,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:34,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:35,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:35,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:35,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853463975] [2021-01-06 22:53:35,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:35,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:35,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:35,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:35,031 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 17 states. [2021-01-06 22:53:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:35,084 INFO L93 Difference]: Finished difference Result 203 states and 520 transitions. [2021-01-06 22:53:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:35,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:35,086 INFO L225 Difference]: With dead ends: 203 [2021-01-06 22:53:35,086 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 22:53:35,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 22:53:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-01-06 22:53:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 22:53:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 442 transitions. [2021-01-06 22:53:35,091 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 442 transitions. Word has length 13 [2021-01-06 22:53:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 442 transitions. [2021-01-06 22:53:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 442 transitions. [2021-01-06 22:53:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:35,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:35,092 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:35,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:35,299 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash -931552816, now seen corresponding path program 17 times [2021-01-06 22:53:35,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:35,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718373148] [2021-01-06 22:53:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:35,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718373148] [2021-01-06 22:53:35,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394754441] [2021-01-06 22:53:35,387 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 22:53:35,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:53:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:35,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:35,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916660409] [2021-01-06 22:53:35,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:35,582 INFO L87 Difference]: Start difference. First operand 166 states and 442 transitions. Second operand 17 states. [2021-01-06 22:53:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:35,675 INFO L93 Difference]: Finished difference Result 219 states and 550 transitions. [2021-01-06 22:53:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:35,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:35,678 INFO L225 Difference]: With dead ends: 219 [2021-01-06 22:53:35,678 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 22:53:35,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 22:53:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 165. [2021-01-06 22:53:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 22:53:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 439 transitions. [2021-01-06 22:53:35,682 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 439 transitions. Word has length 13 [2021-01-06 22:53:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:35,682 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 439 transitions. [2021-01-06 22:53:35,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 439 transitions. [2021-01-06 22:53:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:35,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:35,683 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:35,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:35,884 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1642692190, now seen corresponding path program 18 times [2021-01-06 22:53:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:35,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166382076] [2021-01-06 22:53:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166382076] [2021-01-06 22:53:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78373649] [2021-01-06 22:53:35,980 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 22:53:36,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:53:36,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:53:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:36,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:36,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240504460] [2021-01-06 22:53:36,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:36,182 INFO L87 Difference]: Start difference. First operand 165 states and 439 transitions. Second operand 17 states. [2021-01-06 22:53:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:36,268 INFO L93 Difference]: Finished difference Result 217 states and 543 transitions. [2021-01-06 22:53:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:36,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:36,270 INFO L225 Difference]: With dead ends: 217 [2021-01-06 22:53:36,270 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 22:53:36,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 22:53:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-01-06 22:53:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 22:53:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 436 transitions. [2021-01-06 22:53:36,275 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 436 transitions. Word has length 13 [2021-01-06 22:53:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:36,275 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 436 transitions. [2021-01-06 22:53:36,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 436 transitions. [2021-01-06 22:53:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:36,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:36,276 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:36,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:36,490 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2015045616, now seen corresponding path program 19 times [2021-01-06 22:53:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:36,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521778131] [2021-01-06 22:53:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521778131] [2021-01-06 22:53:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739794002] [2021-01-06 22:53:36,576 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 22:53:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:36,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:36,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:36,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881770261] [2021-01-06 22:53:36,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:36,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:36,774 INFO L87 Difference]: Start difference. First operand 164 states and 436 transitions. Second operand 17 states. [2021-01-06 22:53:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:36,879 INFO L93 Difference]: Finished difference Result 216 states and 543 transitions. [2021-01-06 22:53:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:36,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:36,881 INFO L225 Difference]: With dead ends: 216 [2021-01-06 22:53:36,881 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:36,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2021-01-06 22:53:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 22:53:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 441 transitions. [2021-01-06 22:53:36,886 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 441 transitions. Word has length 13 [2021-01-06 22:53:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:36,886 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 441 transitions. [2021-01-06 22:53:36,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 441 transitions. [2021-01-06 22:53:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:36,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:36,887 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:37,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:37,097 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1994489826, now seen corresponding path program 20 times [2021-01-06 22:53:37,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:37,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137802321] [2021-01-06 22:53:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:37,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137802321] [2021-01-06 22:53:37,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884402221] [2021-01-06 22:53:37,185 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 22:53:37,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:37,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:37,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:37,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136040240] [2021-01-06 22:53:37,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:37,385 INFO L87 Difference]: Start difference. First operand 165 states and 441 transitions. Second operand 17 states. [2021-01-06 22:53:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:37,537 INFO L93 Difference]: Finished difference Result 215 states and 543 transitions. [2021-01-06 22:53:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:53:37,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:37,539 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:37,540 INFO L226 Difference]: Without dead ends: 212 [2021-01-06 22:53:37,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-01-06 22:53:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2021-01-06 22:53:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 22:53:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 448 transitions. [2021-01-06 22:53:37,544 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 448 transitions. Word has length 13 [2021-01-06 22:53:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:37,544 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 448 transitions. [2021-01-06 22:53:37,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 448 transitions. [2021-01-06 22:53:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:37,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:37,545 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:37,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 22:53:37,745 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1993826736, now seen corresponding path program 21 times [2021-01-06 22:53:37,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:37,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014470109] [2021-01-06 22:53:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:37,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014470109] [2021-01-06 22:53:37,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457890645] [2021-01-06 22:53:37,826 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 22:53:37,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:53:37,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:37,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:37,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:38,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:38,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716637099] [2021-01-06 22:53:38,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:38,026 INFO L87 Difference]: Start difference. First operand 167 states and 448 transitions. Second operand 17 states. [2021-01-06 22:53:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:38,223 INFO L93 Difference]: Finished difference Result 214 states and 543 transitions. [2021-01-06 22:53:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:38,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:38,225 INFO L225 Difference]: With dead ends: 214 [2021-01-06 22:53:38,225 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 22:53:38,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 22:53:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-01-06 22:53:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 22:53:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 455 transitions. [2021-01-06 22:53:38,230 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 455 transitions. Word has length 13 [2021-01-06 22:53:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:38,230 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 455 transitions. [2021-01-06 22:53:38,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 455 transitions. [2021-01-06 22:53:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:38,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:38,231 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:38,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-06 22:53:38,445 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1993805346, now seen corresponding path program 22 times [2021-01-06 22:53:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:38,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209819023] [2021-01-06 22:53:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:38,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209819023] [2021-01-06 22:53:38,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875779320] [2021-01-06 22:53:38,531 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 22:53:38,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:38,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:38,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:38,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562005364] [2021-01-06 22:53:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:38,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:38,735 INFO L87 Difference]: Start difference. First operand 169 states and 455 transitions. Second operand 17 states. [2021-01-06 22:53:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:38,964 INFO L93 Difference]: Finished difference Result 223 states and 567 transitions. [2021-01-06 22:53:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:38,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:38,966 INFO L225 Difference]: With dead ends: 223 [2021-01-06 22:53:38,966 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 22:53:38,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 22:53:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2021-01-06 22:53:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 22:53:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 451 transitions. [2021-01-06 22:53:38,970 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 451 transitions. Word has length 13 [2021-01-06 22:53:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:38,971 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 451 transitions. [2021-01-06 22:53:38,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 451 transitions. [2021-01-06 22:53:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:38,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:38,971 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:39,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:39,172 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:39,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2009124029, now seen corresponding path program 65 times [2021-01-06 22:53:39,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:39,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659751372] [2021-01-06 22:53:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659751372] [2021-01-06 22:53:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060276511] [2021-01-06 22:53:39,275 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 22:53:39,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:39,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:39,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:39,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:39,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106647283] [2021-01-06 22:53:39,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:39,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:39,492 INFO L87 Difference]: Start difference. First operand 166 states and 451 transitions. Second operand 18 states. [2021-01-06 22:53:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:39,653 INFO L93 Difference]: Finished difference Result 213 states and 536 transitions. [2021-01-06 22:53:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:39,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:39,655 INFO L225 Difference]: With dead ends: 213 [2021-01-06 22:53:39,656 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 22:53:39,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 22:53:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 172. [2021-01-06 22:53:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:53:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 461 transitions. [2021-01-06 22:53:39,661 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 461 transitions. Word has length 14 [2021-01-06 22:53:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:39,661 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 461 transitions. [2021-01-06 22:53:39,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 461 transitions. [2021-01-06 22:53:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:39,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:39,662 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:39,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:39,862 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843169, now seen corresponding path program 66 times [2021-01-06 22:53:39,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:39,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432363943] [2021-01-06 22:53:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:39,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432363943] [2021-01-06 22:53:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608697344] [2021-01-06 22:53:39,965 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 22:53:40,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:40,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:40,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-01-06 22:53:40,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062613464] [2021-01-06 22:53:40,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:40,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:40,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:40,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:40,071 INFO L87 Difference]: Start difference. First operand 172 states and 461 transitions. Second operand 13 states. [2021-01-06 22:53:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:40,331 INFO L93 Difference]: Finished difference Result 284 states and 691 transitions. [2021-01-06 22:53:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:40,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 22:53:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:40,334 INFO L225 Difference]: With dead ends: 284 [2021-01-06 22:53:40,334 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 22:53:40,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 22:53:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 168. [2021-01-06 22:53:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 22:53:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2021-01-06 22:53:40,338 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2021-01-06 22:53:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:40,339 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2021-01-06 22:53:40,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2021-01-06 22:53:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:40,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:40,339 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:40,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:40,540 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1147189887, now seen corresponding path program 67 times [2021-01-06 22:53:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:40,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537860918] [2021-01-06 22:53:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:40,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537860918] [2021-01-06 22:53:40,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057481232] [2021-01-06 22:53:40,623 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 22:53:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:40,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:40,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:40,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290851188] [2021-01-06 22:53:40,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:40,941 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 18 states. [2021-01-06 22:53:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:41,478 INFO L93 Difference]: Finished difference Result 243 states and 603 transitions. [2021-01-06 22:53:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:53:41,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:41,481 INFO L225 Difference]: With dead ends: 243 [2021-01-06 22:53:41,481 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 22:53:41,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 22:53:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 172. [2021-01-06 22:53:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:53:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 463 transitions. [2021-01-06 22:53:41,484 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 463 transitions. Word has length 14 [2021-01-06 22:53:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:41,484 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 463 transitions. [2021-01-06 22:53:41,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 463 transitions. [2021-01-06 22:53:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:41,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:41,485 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:41,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:41,686 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash -877283427, now seen corresponding path program 68 times [2021-01-06 22:53:41,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:41,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565095301] [2021-01-06 22:53:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565095301] [2021-01-06 22:53:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285617974] [2021-01-06 22:53:41,776 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 22:53:41,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:42,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:42,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:42,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265146150] [2021-01-06 22:53:42,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:42,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:42,082 INFO L87 Difference]: Start difference. First operand 172 states and 463 transitions. Second operand 18 states. [2021-01-06 22:53:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:42,874 INFO L93 Difference]: Finished difference Result 256 states and 625 transitions. [2021-01-06 22:53:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:42,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:42,877 INFO L225 Difference]: With dead ends: 256 [2021-01-06 22:53:42,877 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 22:53:42,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 22:53:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 174. [2021-01-06 22:53:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:53:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2021-01-06 22:53:42,880 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2021-01-06 22:53:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:42,881 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2021-01-06 22:53:42,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2021-01-06 22:53:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:42,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:42,881 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:43,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:43,082 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash -876677997, now seen corresponding path program 69 times [2021-01-06 22:53:43,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:43,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278289427] [2021-01-06 22:53:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:43,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278289427] [2021-01-06 22:53:43,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603808733] [2021-01-06 22:53:43,176 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 22:53:43,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:43,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:43,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:43,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785557389] [2021-01-06 22:53:43,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:43,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:43,469 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 18 states. [2021-01-06 22:53:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:44,996 INFO L93 Difference]: Finished difference Result 265 states and 651 transitions. [2021-01-06 22:53:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:44,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:44,998 INFO L225 Difference]: With dead ends: 265 [2021-01-06 22:53:44,998 INFO L226 Difference]: Without dead ends: 263 [2021-01-06 22:53:44,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-01-06 22:53:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-01-06 22:53:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:53:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 477 transitions. [2021-01-06 22:53:45,003 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 477 transitions. Word has length 14 [2021-01-06 22:53:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:45,004 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 477 transitions. [2021-01-06 22:53:45,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 477 transitions. [2021-01-06 22:53:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:45,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:45,004 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:45,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:45,205 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash -876658529, now seen corresponding path program 70 times [2021-01-06 22:53:45,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262588245] [2021-01-06 22:53:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:45,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262588245] [2021-01-06 22:53:45,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188581966] [2021-01-06 22:53:45,303 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 22:53:45,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:45,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:45,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:45,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:45,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:45,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:45,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447596785] [2021-01-06 22:53:45,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:45,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:45,540 INFO L87 Difference]: Start difference. First operand 176 states and 477 transitions. Second operand 17 states. [2021-01-06 22:53:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:46,172 INFO L93 Difference]: Finished difference Result 267 states and 656 transitions. [2021-01-06 22:53:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:46,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:46,176 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:53:46,176 INFO L226 Difference]: Without dead ends: 259 [2021-01-06 22:53:46,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:53:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-01-06 22:53:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 177. [2021-01-06 22:53:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:53:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 482 transitions. [2021-01-06 22:53:46,182 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 482 transitions. Word has length 14 [2021-01-06 22:53:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:46,182 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 482 transitions. [2021-01-06 22:53:46,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 482 transitions. [2021-01-06 22:53:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:46,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:46,183 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:46,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:46,393 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -876656607, now seen corresponding path program 71 times [2021-01-06 22:53:46,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:46,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264791026] [2021-01-06 22:53:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264791026] [2021-01-06 22:53:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904408933] [2021-01-06 22:53:46,490 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 22:53:46,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:46,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:46,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:46,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:53:46,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:46,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:46,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:46,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712246003] [2021-01-06 22:53:46,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:46,774 INFO L87 Difference]: Start difference. First operand 177 states and 482 transitions. Second operand 18 states. [2021-01-06 22:53:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:47,572 INFO L93 Difference]: Finished difference Result 318 states and 770 transitions. [2021-01-06 22:53:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:53:47,573 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:47,574 INFO L225 Difference]: With dead ends: 318 [2021-01-06 22:53:47,575 INFO L226 Difference]: Without dead ends: 306 [2021-01-06 22:53:47,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:53:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-01-06 22:53:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2021-01-06 22:53:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 22:53:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2021-01-06 22:53:47,580 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2021-01-06 22:53:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:47,580 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2021-01-06 22:53:47,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2021-01-06 22:53:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:47,581 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:47,581 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:47,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-06 22:53:47,789 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1434629425, now seen corresponding path program 72 times [2021-01-06 22:53:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:47,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796639780] [2021-01-06 22:53:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:47,892 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 22:53:47,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796639780] [2021-01-06 22:53:47,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781189399] [2021-01-06 22:53:47,893 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 22:53:47,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:47,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:48,181 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 22:53:48,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:48,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:48,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091687816] [2021-01-06 22:53:48,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:48,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:48,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:48,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:48,182 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 18 states. [2021-01-06 22:53:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:48,633 INFO L93 Difference]: Finished difference Result 251 states and 621 transitions. [2021-01-06 22:53:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:48,634 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:48,636 INFO L225 Difference]: With dead ends: 251 [2021-01-06 22:53:48,636 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 22:53:48,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 22:53:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2021-01-06 22:53:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 22:53:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 466 transitions. [2021-01-06 22:53:48,642 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 466 transitions. Word has length 14 [2021-01-06 22:53:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:48,642 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 466 transitions. [2021-01-06 22:53:48,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 466 transitions. [2021-01-06 22:53:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:48,643 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:48,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:48,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:48,857 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:48,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1657463757, now seen corresponding path program 73 times [2021-01-06 22:53:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:48,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281139435] [2021-01-06 22:53:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:48,951 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 22:53:48,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281139435] [2021-01-06 22:53:48,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66019222] [2021-01-06 22:53:48,952 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 22:53:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:49,226 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 22:53:49,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:49,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:49,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346723273] [2021-01-06 22:53:49,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:49,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:49,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:49,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:49,228 INFO L87 Difference]: Start difference. First operand 173 states and 466 transitions. Second operand 18 states. [2021-01-06 22:53:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:49,694 INFO L93 Difference]: Finished difference Result 254 states and 623 transitions. [2021-01-06 22:53:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:49,694 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:49,696 INFO L225 Difference]: With dead ends: 254 [2021-01-06 22:53:49,696 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 22:53:49,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 22:53:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 173. [2021-01-06 22:53:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 22:53:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 465 transitions. [2021-01-06 22:53:49,700 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 465 transitions. Word has length 14 [2021-01-06 22:53:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:49,700 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 465 transitions. [2021-01-06 22:53:49,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 465 transitions. [2021-01-06 22:53:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:49,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:49,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-06 22:53:49,904 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1636907967, now seen corresponding path program 74 times [2021-01-06 22:53:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90499485] [2021-01-06 22:53:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:49,992 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 22:53:49,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90499485] [2021-01-06 22:53:49,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202267712] [2021-01-06 22:53:49,992 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 22:53:50,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:50,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:50,260 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 22:53:50,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:50,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:50,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036159599] [2021-01-06 22:53:50,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:50,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:50,262 INFO L87 Difference]: Start difference. First operand 173 states and 465 transitions. Second operand 18 states. [2021-01-06 22:53:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:50,870 INFO L93 Difference]: Finished difference Result 277 states and 679 transitions. [2021-01-06 22:53:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:53:50,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:50,871 INFO L225 Difference]: With dead ends: 277 [2021-01-06 22:53:50,872 INFO L226 Difference]: Without dead ends: 275 [2021-01-06 22:53:50,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:53:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-01-06 22:53:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 175. [2021-01-06 22:53:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:53:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2021-01-06 22:53:50,883 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 14 [2021-01-06 22:53:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:50,883 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2021-01-06 22:53:50,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2021-01-06 22:53:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:50,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:50,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:51,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:51,097 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1636302537, now seen corresponding path program 75 times [2021-01-06 22:53:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:51,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042560882] [2021-01-06 22:53:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:51,195 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 22:53:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042560882] [2021-01-06 22:53:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886170297] [2021-01-06 22:53:51,195 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 22:53:51,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:51,468 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 22:53:51,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:51,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:51,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569087969] [2021-01-06 22:53:51,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:51,469 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand 18 states. [2021-01-06 22:53:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:52,124 INFO L93 Difference]: Finished difference Result 267 states and 654 transitions. [2021-01-06 22:53:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:52,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:52,126 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:53:52,126 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 22:53:52,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:53:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 22:53:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 177. [2021-01-06 22:53:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:53:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2021-01-06 22:53:52,131 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2021-01-06 22:53:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:52,131 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2021-01-06 22:53:52,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2021-01-06 22:53:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:52,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:52,132 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:52,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 22:53:52,333 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1636283069, now seen corresponding path program 76 times [2021-01-06 22:53:52,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:52,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287031450] [2021-01-06 22:53:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287031450] [2021-01-06 22:53:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018571752] [2021-01-06 22:53:52,423 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 22:53:52,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:52,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:52,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:52,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:52,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:52,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:52,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471387082] [2021-01-06 22:53:52,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:52,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:52,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:52,683 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2021-01-06 22:53:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:53,672 INFO L93 Difference]: Finished difference Result 287 states and 712 transitions. [2021-01-06 22:53:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:53:53,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:53,675 INFO L225 Difference]: With dead ends: 287 [2021-01-06 22:53:53,675 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 22:53:53,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:53:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 22:53:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 180. [2021-01-06 22:53:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:53:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 494 transitions. [2021-01-06 22:53:53,681 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 494 transitions. Word has length 14 [2021-01-06 22:53:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:53,681 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 494 transitions. [2021-01-06 22:53:53,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 494 transitions. [2021-01-06 22:53:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:53,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:53,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:53,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 22:53:53,891 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1636281147, now seen corresponding path program 77 times [2021-01-06 22:53:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:53,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643899879] [2021-01-06 22:53:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:53,996 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 22:53:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643899879] [2021-01-06 22:53:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240467571] [2021-01-06 22:53:53,996 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 22:53:54,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:54,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:54,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:54,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:54,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:54,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:53:54,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:53:54,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:54,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:54,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:54,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:54,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:54,376 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 22:53:54,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:54,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644790845] [2021-01-06 22:53:54,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:54,378 INFO L87 Difference]: Start difference. First operand 180 states and 494 transitions. Second operand 18 states. [2021-01-06 22:53:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:55,482 INFO L93 Difference]: Finished difference Result 319 states and 790 transitions. [2021-01-06 22:53:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:53:55,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:55,484 INFO L225 Difference]: With dead ends: 319 [2021-01-06 22:53:55,485 INFO L226 Difference]: Without dead ends: 307 [2021-01-06 22:53:55,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:53:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-01-06 22:53:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 168. [2021-01-06 22:53:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 22:53:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2021-01-06 22:53:55,488 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2021-01-06 22:53:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:55,489 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2021-01-06 22:53:55,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2021-01-06 22:53:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:55,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:55,489 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:55,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-06 22:53:55,690 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1757227135, now seen corresponding path program 78 times [2021-01-06 22:53:55,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:55,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268734408] [2021-01-06 22:53:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:55,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268734408] [2021-01-06 22:53:55,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892827425] [2021-01-06 22:53:55,802 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 22:53:55,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:56,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:56,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:56,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926882752] [2021-01-06 22:53:56,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:56,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:56,053 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 18 states. [2021-01-06 22:53:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:56,477 INFO L93 Difference]: Finished difference Result 245 states and 613 transitions. [2021-01-06 22:53:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:56,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:56,479 INFO L225 Difference]: With dead ends: 245 [2021-01-06 22:53:56,479 INFO L226 Difference]: Without dead ends: 243 [2021-01-06 22:53:56,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-01-06 22:53:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2021-01-06 22:53:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 22:53:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 460 transitions. [2021-01-06 22:53:56,484 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 460 transitions. Word has length 14 [2021-01-06 22:53:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:56,484 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 460 transitions. [2021-01-06 22:53:56,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 460 transitions. [2021-01-06 22:53:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:56,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:56,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:56,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:56,686 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1757225213, now seen corresponding path program 79 times [2021-01-06 22:53:56,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:56,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336253345] [2021-01-06 22:53:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:56,795 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 22:53:56,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336253345] [2021-01-06 22:53:56,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785192153] [2021-01-06 22:53:56,795 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 22:53:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:56,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:57,048 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 22:53:57,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:57,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014386755] [2021-01-06 22:53:57,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:57,049 INFO L87 Difference]: Start difference. First operand 169 states and 460 transitions. Second operand 18 states. [2021-01-06 22:53:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:57,527 INFO L93 Difference]: Finished difference Result 255 states and 634 transitions. [2021-01-06 22:53:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:53:57,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:57,529 INFO L225 Difference]: With dead ends: 255 [2021-01-06 22:53:57,529 INFO L226 Difference]: Without dead ends: 253 [2021-01-06 22:53:57,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-01-06 22:53:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 170. [2021-01-06 22:53:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 22:53:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 463 transitions. [2021-01-06 22:53:57,534 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 463 transitions. Word has length 14 [2021-01-06 22:53:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:57,534 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 463 transitions. [2021-01-06 22:53:57,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 463 transitions. [2021-01-06 22:53:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:57,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:57,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:57,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-06 22:53:57,735 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1755380093, now seen corresponding path program 80 times [2021-01-06 22:53:57,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:57,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414983860] [2021-01-06 22:53:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:57,864 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 22:53:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414983860] [2021-01-06 22:53:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254135603] [2021-01-06 22:53:57,865 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 22:53:57,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:57,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:58,112 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 22:53:58,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:58,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:58,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416492105] [2021-01-06 22:53:58,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:58,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:58,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:58,114 INFO L87 Difference]: Start difference. First operand 170 states and 463 transitions. Second operand 18 states. [2021-01-06 22:53:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:58,649 INFO L93 Difference]: Finished difference Result 254 states and 631 transitions. [2021-01-06 22:53:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:58,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:58,650 INFO L225 Difference]: With dead ends: 254 [2021-01-06 22:53:58,651 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 22:53:58,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 22:53:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 171. [2021-01-06 22:53:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 22:53:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 466 transitions. [2021-01-06 22:53:58,655 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 466 transitions. Word has length 14 [2021-01-06 22:53:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:58,656 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 466 transitions. [2021-01-06 22:53:58,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 466 transitions. [2021-01-06 22:53:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:58,656 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:58,656 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:58,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:58,869 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1755318589, now seen corresponding path program 81 times [2021-01-06 22:53:58,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:58,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169851470] [2021-01-06 22:53:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169851470] [2021-01-06 22:53:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817956372] [2021-01-06 22:53:58,986 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 22:53:59,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:59,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:53:59,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:59,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:59,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185893334] [2021-01-06 22:53:59,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:59,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:59,285 INFO L87 Difference]: Start difference. First operand 171 states and 466 transitions. Second operand 18 states. [2021-01-06 22:53:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:59,727 INFO L93 Difference]: Finished difference Result 241 states and 605 transitions. [2021-01-06 22:53:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:53:59,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:59,729 INFO L225 Difference]: With dead ends: 241 [2021-01-06 22:53:59,729 INFO L226 Difference]: Without dead ends: 239 [2021-01-06 22:53:59,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:53:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-01-06 22:53:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 175. [2021-01-06 22:53:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:53:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 470 transitions. [2021-01-06 22:53:59,734 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 470 transitions. Word has length 14 [2021-01-06 22:53:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:59,735 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 470 transitions. [2021-01-06 22:53:59,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 470 transitions. [2021-01-06 22:53:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:59,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:59,736 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:59,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-06 22:53:59,946 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash -75156835, now seen corresponding path program 82 times [2021-01-06 22:53:59,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:59,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302582065] [2021-01-06 22:53:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302582065] [2021-01-06 22:54:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197225202] [2021-01-06 22:54:00,046 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 22:54:00,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:00,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:00,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:00,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972721442] [2021-01-06 22:54:00,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:00,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:00,270 INFO L87 Difference]: Start difference. First operand 175 states and 470 transitions. Second operand 18 states. [2021-01-06 22:54:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:00,706 INFO L93 Difference]: Finished difference Result 273 states and 667 transitions. [2021-01-06 22:54:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:00,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:00,708 INFO L225 Difference]: With dead ends: 273 [2021-01-06 22:54:00,708 INFO L226 Difference]: Without dead ends: 271 [2021-01-06 22:54:00,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-01-06 22:54:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 175. [2021-01-06 22:54:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 470 transitions. [2021-01-06 22:54:00,713 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 470 transitions. Word has length 14 [2021-01-06 22:54:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 470 transitions. [2021-01-06 22:54:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 470 transitions. [2021-01-06 22:54:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:00,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:00,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:00,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:00,914 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -75154913, now seen corresponding path program 83 times [2021-01-06 22:54:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:00,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86078819] [2021-01-06 22:54:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:01,010 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 22:54:01,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86078819] [2021-01-06 22:54:01,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322867616] [2021-01-06 22:54:01,011 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 22:54:01,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:01,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:01,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:01,256 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 22:54:01,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:01,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162724502] [2021-01-06 22:54:01,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:01,258 INFO L87 Difference]: Start difference. First operand 175 states and 470 transitions. Second operand 18 states. [2021-01-06 22:54:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:01,719 INFO L93 Difference]: Finished difference Result 280 states and 683 transitions. [2021-01-06 22:54:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:01,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:01,721 INFO L225 Difference]: With dead ends: 280 [2021-01-06 22:54:01,722 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 22:54:01,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 22:54:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 175. [2021-01-06 22:54:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 470 transitions. [2021-01-06 22:54:01,725 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 470 transitions. Word has length 14 [2021-01-06 22:54:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:01,725 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 470 transitions. [2021-01-06 22:54:01,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 470 transitions. [2021-01-06 22:54:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:01,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:01,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:01,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:01,926 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash -73309793, now seen corresponding path program 84 times [2021-01-06 22:54:01,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:01,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618320927] [2021-01-06 22:54:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:02,030 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 22:54:02,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618320927] [2021-01-06 22:54:02,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365862341] [2021-01-06 22:54:02,030 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 22:54:02,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:02,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:02,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:02,286 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 22:54:02,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:02,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:02,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139452568] [2021-01-06 22:54:02,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:02,287 INFO L87 Difference]: Start difference. First operand 175 states and 470 transitions. Second operand 18 states. [2021-01-06 22:54:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:02,924 INFO L93 Difference]: Finished difference Result 272 states and 664 transitions. [2021-01-06 22:54:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:02,925 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:02,926 INFO L225 Difference]: With dead ends: 272 [2021-01-06 22:54:02,926 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 22:54:02,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:54:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 22:54:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 176. [2021-01-06 22:54:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 473 transitions. [2021-01-06 22:54:02,931 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 473 transitions. Word has length 14 [2021-01-06 22:54:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:02,931 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 473 transitions. [2021-01-06 22:54:02,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 473 transitions. [2021-01-06 22:54:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:02,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:02,932 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:03,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-06 22:54:03,132 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash -73248289, now seen corresponding path program 85 times [2021-01-06 22:54:03,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:03,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275847781] [2021-01-06 22:54:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275847781] [2021-01-06 22:54:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77697253] [2021-01-06 22:54:03,254 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 22:54:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:03,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:03,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:03,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:03,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:03,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116527346] [2021-01-06 22:54:03,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:03,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:03,514 INFO L87 Difference]: Start difference. First operand 176 states and 473 transitions. Second operand 18 states. [2021-01-06 22:54:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:03,925 INFO L93 Difference]: Finished difference Result 247 states and 614 transitions. [2021-01-06 22:54:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:03,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:03,927 INFO L225 Difference]: With dead ends: 247 [2021-01-06 22:54:03,927 INFO L226 Difference]: Without dead ends: 245 [2021-01-06 22:54:03,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-01-06 22:54:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 175. [2021-01-06 22:54:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 469 transitions. [2021-01-06 22:54:03,931 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 469 transitions. Word has length 14 [2021-01-06 22:54:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:03,931 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 469 transitions. [2021-01-06 22:54:03,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 469 transitions. [2021-01-06 22:54:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:03,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:03,932 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:04,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-06 22:54:04,132 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash 506661395, now seen corresponding path program 86 times [2021-01-06 22:54:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:04,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991122123] [2021-01-06 22:54:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:04,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991122123] [2021-01-06 22:54:04,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811741906] [2021-01-06 22:54:04,245 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:04,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:04,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393915767] [2021-01-06 22:54:04,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:04,507 INFO L87 Difference]: Start difference. First operand 175 states and 469 transitions. Second operand 18 states. [2021-01-06 22:54:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:05,178 INFO L93 Difference]: Finished difference Result 276 states and 669 transitions. [2021-01-06 22:54:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:05,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:05,180 INFO L225 Difference]: With dead ends: 276 [2021-01-06 22:54:05,180 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 22:54:05,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:54:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 22:54:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 174. [2021-01-06 22:54:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:54:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 466 transitions. [2021-01-06 22:54:05,185 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 466 transitions. Word has length 14 [2021-01-06 22:54:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:05,185 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 466 transitions. [2021-01-06 22:54:05,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 466 transitions. [2021-01-06 22:54:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:05,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:05,186 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:05,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:05,393 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 506663317, now seen corresponding path program 87 times [2021-01-06 22:54:05,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:05,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199205707] [2021-01-06 22:54:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:05,488 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 22:54:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199205707] [2021-01-06 22:54:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967836045] [2021-01-06 22:54:05,488 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:05,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:54:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:05,739 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 22:54:05,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:05,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112517636] [2021-01-06 22:54:05,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:05,741 INFO L87 Difference]: Start difference. First operand 174 states and 466 transitions. Second operand 18 states. [2021-01-06 22:54:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:06,335 INFO L93 Difference]: Finished difference Result 288 states and 698 transitions. [2021-01-06 22:54:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:06,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:06,337 INFO L225 Difference]: With dead ends: 288 [2021-01-06 22:54:06,337 INFO L226 Difference]: Without dead ends: 286 [2021-01-06 22:54:06,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-01-06 22:54:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 175. [2021-01-06 22:54:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 468 transitions. [2021-01-06 22:54:06,341 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 468 transitions. Word has length 14 [2021-01-06 22:54:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:06,341 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 468 transitions. [2021-01-06 22:54:06,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 468 transitions. [2021-01-06 22:54:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:06,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:06,341 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:06,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-06 22:54:06,542 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash 525429725, now seen corresponding path program 88 times [2021-01-06 22:54:06,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:06,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595770246] [2021-01-06 22:54:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:06,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595770246] [2021-01-06 22:54:06,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294336068] [2021-01-06 22:54:06,659 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:06,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:06,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:06,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:06,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038636420] [2021-01-06 22:54:06,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:06,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:06,934 INFO L87 Difference]: Start difference. First operand 175 states and 468 transitions. Second operand 18 states. [2021-01-06 22:54:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:07,752 INFO L93 Difference]: Finished difference Result 280 states and 676 transitions. [2021-01-06 22:54:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:07,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:07,754 INFO L225 Difference]: With dead ends: 280 [2021-01-06 22:54:07,754 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 22:54:07,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:54:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 22:54:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 176. [2021-01-06 22:54:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 473 transitions. [2021-01-06 22:54:07,760 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 473 transitions. Word has length 14 [2021-01-06 22:54:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:07,760 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 473 transitions. [2021-01-06 22:54:07,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 473 transitions. [2021-01-06 22:54:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:07,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:07,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:07,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-06 22:54:07,961 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash 525431647, now seen corresponding path program 89 times [2021-01-06 22:54:07,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:07,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464952873] [2021-01-06 22:54:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:08,079 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 22:54:08,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464952873] [2021-01-06 22:54:08,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130813510] [2021-01-06 22:54:08,080 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:08,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:08,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:08,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:08,358 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 22:54:08,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:08,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:08,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402849831] [2021-01-06 22:54:08,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:08,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:08,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:08,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:08,360 INFO L87 Difference]: Start difference. First operand 176 states and 473 transitions. Second operand 18 states. [2021-01-06 22:54:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:09,222 INFO L93 Difference]: Finished difference Result 283 states and 693 transitions. [2021-01-06 22:54:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:09,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:09,224 INFO L225 Difference]: With dead ends: 283 [2021-01-06 22:54:09,224 INFO L226 Difference]: Without dead ends: 281 [2021-01-06 22:54:09,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-01-06 22:54:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 178. [2021-01-06 22:54:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 480 transitions. [2021-01-06 22:54:09,230 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 480 transitions. Word has length 14 [2021-01-06 22:54:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:09,230 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 480 transitions. [2021-01-06 22:54:09,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 480 transitions. [2021-01-06 22:54:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:09,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:09,231 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:09,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-01-06 22:54:09,445 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash 526035155, now seen corresponding path program 90 times [2021-01-06 22:54:09,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:09,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606023835] [2021-01-06 22:54:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:09,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606023835] [2021-01-06 22:54:09,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662821694] [2021-01-06 22:54:09,567 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:09,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:09,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:09,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:09,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:09,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676013693] [2021-01-06 22:54:09,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:09,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:09,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:09,845 INFO L87 Difference]: Start difference. First operand 178 states and 480 transitions. Second operand 18 states. [2021-01-06 22:54:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:10,689 INFO L93 Difference]: Finished difference Result 267 states and 665 transitions. [2021-01-06 22:54:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:10,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:10,692 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:54:10,692 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 22:54:10,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:54:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 22:54:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 180. [2021-01-06 22:54:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 487 transitions. [2021-01-06 22:54:10,696 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 487 transitions. Word has length 14 [2021-01-06 22:54:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:10,696 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 487 transitions. [2021-01-06 22:54:10,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 487 transitions. [2021-01-06 22:54:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:10,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:10,697 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:10,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:10,898 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:10,898 INFO L82 PathProgramCache]: Analyzing trace with hash 526054623, now seen corresponding path program 91 times [2021-01-06 22:54:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:10,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007946260] [2021-01-06 22:54:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007946260] [2021-01-06 22:54:11,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143392318] [2021-01-06 22:54:11,009 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:11,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:11,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:11,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:11,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361750922] [2021-01-06 22:54:11,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:11,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:11,231 INFO L87 Difference]: Start difference. First operand 180 states and 487 transitions. Second operand 18 states. [2021-01-06 22:54:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:12,148 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2021-01-06 22:54:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 22:54:12,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:12,150 INFO L225 Difference]: With dead ends: 315 [2021-01-06 22:54:12,150 INFO L226 Difference]: Without dead ends: 303 [2021-01-06 22:54:12,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-01-06 22:54:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 180. [2021-01-06 22:54:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 486 transitions. [2021-01-06 22:54:12,156 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 486 transitions. Word has length 14 [2021-01-06 22:54:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:12,156 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 486 transitions. [2021-01-06 22:54:12,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 486 transitions. [2021-01-06 22:54:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:12,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:12,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:12,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-01-06 22:54:12,370 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:12,370 INFO L82 PathProgramCache]: Analyzing trace with hash 526094737, now seen corresponding path program 92 times [2021-01-06 22:54:12,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:12,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910856075] [2021-01-06 22:54:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:12,475 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 22:54:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910856075] [2021-01-06 22:54:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507895287] [2021-01-06 22:54:12,476 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:12,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:12,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:12,743 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 22:54:12,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:12,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:12,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956674977] [2021-01-06 22:54:12,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:12,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:12,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:12,745 INFO L87 Difference]: Start difference. First operand 180 states and 486 transitions. Second operand 18 states. [2021-01-06 22:54:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:13,671 INFO L93 Difference]: Finished difference Result 287 states and 714 transitions. [2021-01-06 22:54:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:13,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:13,674 INFO L225 Difference]: With dead ends: 287 [2021-01-06 22:54:13,674 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 22:54:13,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1000, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:54:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 22:54:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 182. [2021-01-06 22:54:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 493 transitions. [2021-01-06 22:54:13,677 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 493 transitions. Word has length 14 [2021-01-06 22:54:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:13,678 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 493 transitions. [2021-01-06 22:54:13,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 493 transitions. [2021-01-06 22:54:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:13,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:13,678 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:13,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-01-06 22:54:13,894 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:13,894 INFO L82 PathProgramCache]: Analyzing trace with hash 526114205, now seen corresponding path program 93 times [2021-01-06 22:54:13,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:13,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269342797] [2021-01-06 22:54:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:13,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269342797] [2021-01-06 22:54:13,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933470625] [2021-01-06 22:54:13,993 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:54:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:54:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:14,215 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:14,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:14,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:14,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:14,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:14,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33122003] [2021-01-06 22:54:14,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:14,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:14,238 INFO L87 Difference]: Start difference. First operand 182 states and 493 transitions. Second operand 17 states. [2021-01-06 22:54:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:15,747 INFO L93 Difference]: Finished difference Result 324 states and 803 transitions. [2021-01-06 22:54:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 22:54:15,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:15,749 INFO L225 Difference]: With dead ends: 324 [2021-01-06 22:54:15,750 INFO L226 Difference]: Without dead ends: 316 [2021-01-06 22:54:15,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1757, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 22:54:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-01-06 22:54:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 184. [2021-01-06 22:54:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2021-01-06 22:54:15,754 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 14 [2021-01-06 22:54:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:15,754 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2021-01-06 22:54:15,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2021-01-06 22:54:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:15,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:15,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:15,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:15,955 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:15,956 INFO L82 PathProgramCache]: Analyzing trace with hash 526116127, now seen corresponding path program 94 times [2021-01-06 22:54:15,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:15,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716068140] [2021-01-06 22:54:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:16,057 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 22:54:16,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716068140] [2021-01-06 22:54:16,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408292115] [2021-01-06 22:54:16,058 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:16,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:16,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:16,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:16,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:16,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:16,309 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 22:54:16,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:16,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:16,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287698893] [2021-01-06 22:54:16,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:16,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:16,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:16,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:16,311 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand 18 states. [2021-01-06 22:54:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:17,757 INFO L93 Difference]: Finished difference Result 337 states and 838 transitions. [2021-01-06 22:54:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 22:54:17,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:17,759 INFO L225 Difference]: With dead ends: 337 [2021-01-06 22:54:17,760 INFO L226 Difference]: Without dead ends: 325 [2021-01-06 22:54:17,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=623, Invalid=1633, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:54:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-01-06 22:54:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 177. [2021-01-06 22:54:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2021-01-06 22:54:17,765 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2021-01-06 22:54:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:17,766 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2021-01-06 22:54:17,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2021-01-06 22:54:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:17,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:17,766 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:17,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:17,980 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash 563919697, now seen corresponding path program 95 times [2021-01-06 22:54:17,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:17,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635504856] [2021-01-06 22:54:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:18,094 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 22:54:18,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635504856] [2021-01-06 22:54:18,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804280600] [2021-01-06 22:54:18,095 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:18,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:18,339 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 22:54:18,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:18,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525895106] [2021-01-06 22:54:18,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:18,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:18,340 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 18 states. [2021-01-06 22:54:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:19,210 INFO L93 Difference]: Finished difference Result 300 states and 728 transitions. [2021-01-06 22:54:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 22:54:19,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:19,213 INFO L225 Difference]: With dead ends: 300 [2021-01-06 22:54:19,213 INFO L226 Difference]: Without dead ends: 298 [2021-01-06 22:54:19,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:54:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-01-06 22:54:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 179. [2021-01-06 22:54:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 487 transitions. [2021-01-06 22:54:19,218 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 487 transitions. Word has length 14 [2021-01-06 22:54:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:19,218 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 487 transitions. [2021-01-06 22:54:19,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 487 transitions. [2021-01-06 22:54:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:19,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:19,219 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:19,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:19,421 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash 563981201, now seen corresponding path program 96 times [2021-01-06 22:54:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:19,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741791626] [2021-01-06 22:54:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:19,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741791626] [2021-01-06 22:54:19,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380255779] [2021-01-06 22:54:19,537 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:19,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:19,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52544758] [2021-01-06 22:54:19,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:19,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:19,778 INFO L87 Difference]: Start difference. First operand 179 states and 487 transitions. Second operand 18 states. [2021-01-06 22:54:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:20,272 INFO L93 Difference]: Finished difference Result 263 states and 653 transitions. [2021-01-06 22:54:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:20,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:20,274 INFO L225 Difference]: With dead ends: 263 [2021-01-06 22:54:20,274 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 22:54:20,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:54:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 22:54:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-01-06 22:54:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 486 transitions. [2021-01-06 22:54:20,278 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 486 transitions. Word has length 14 [2021-01-06 22:54:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:20,278 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 486 transitions. [2021-01-06 22:54:20,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 486 transitions. [2021-01-06 22:54:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:20,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:20,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:20,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:20,480 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 582688027, now seen corresponding path program 97 times [2021-01-06 22:54:20,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:20,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454208514] [2021-01-06 22:54:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:20,579 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 22:54:20,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454208514] [2021-01-06 22:54:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275223387] [2021-01-06 22:54:20,580 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:20,861 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 22:54:20,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:20,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908981719] [2021-01-06 22:54:20,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:20,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:20,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:20,863 INFO L87 Difference]: Start difference. First operand 179 states and 486 transitions. Second operand 18 states. [2021-01-06 22:54:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:21,787 INFO L93 Difference]: Finished difference Result 300 states and 732 transitions. [2021-01-06 22:54:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:54:21,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:21,789 INFO L225 Difference]: With dead ends: 300 [2021-01-06 22:54:21,789 INFO L226 Difference]: Without dead ends: 298 [2021-01-06 22:54:21,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=952, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:54:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-01-06 22:54:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 181. [2021-01-06 22:54:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 496 transitions. [2021-01-06 22:54:21,793 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 496 transitions. Word has length 14 [2021-01-06 22:54:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:21,794 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 496 transitions. [2021-01-06 22:54:21,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 496 transitions. [2021-01-06 22:54:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:21,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:21,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:21,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-01-06 22:54:21,995 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash 583293457, now seen corresponding path program 98 times [2021-01-06 22:54:21,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:21,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225751962] [2021-01-06 22:54:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:22,114 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 22:54:22,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225751962] [2021-01-06 22:54:22,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71240292] [2021-01-06 22:54:22,114 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:22,377 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 22:54:22,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:22,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549000983] [2021-01-06 22:54:22,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:22,379 INFO L87 Difference]: Start difference. First operand 181 states and 496 transitions. Second operand 18 states. [2021-01-06 22:54:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:23,453 INFO L93 Difference]: Finished difference Result 283 states and 703 transitions. [2021-01-06 22:54:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:23,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:23,455 INFO L225 Difference]: With dead ends: 283 [2021-01-06 22:54:23,455 INFO L226 Difference]: Without dead ends: 281 [2021-01-06 22:54:23,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:54:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-01-06 22:54:23,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 184. [2021-01-06 22:54:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 508 transitions. [2021-01-06 22:54:23,461 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 508 transitions. Word has length 14 [2021-01-06 22:54:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:23,461 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 508 transitions. [2021-01-06 22:54:23,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 508 transitions. [2021-01-06 22:54:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:23,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:23,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:23,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-01-06 22:54:23,664 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 583314847, now seen corresponding path program 99 times [2021-01-06 22:54:23,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:23,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464088813] [2021-01-06 22:54:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:23,783 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 22:54:23,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464088813] [2021-01-06 22:54:23,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211134897] [2021-01-06 22:54:23,784 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:23,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:24,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:24,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:54:24,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:24,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:24,037 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:24,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:24,091 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 22:54:24,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:24,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220086758] [2021-01-06 22:54:24,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:24,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:24,092 INFO L87 Difference]: Start difference. First operand 184 states and 508 transitions. Second operand 18 states. [2021-01-06 22:54:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:25,752 INFO L93 Difference]: Finished difference Result 330 states and 813 transitions. [2021-01-06 22:54:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 22:54:25,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:25,754 INFO L225 Difference]: With dead ends: 330 [2021-01-06 22:54:25,754 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 22:54:25,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:54:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 22:54:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 180. [2021-01-06 22:54:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 491 transitions. [2021-01-06 22:54:25,758 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 491 transitions. Word has length 14 [2021-01-06 22:54:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:25,759 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 491 transitions. [2021-01-06 22:54:25,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 491 transitions. [2021-01-06 22:54:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:25,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:25,759 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-01-06 22:54:25,960 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 584536991, now seen corresponding path program 100 times [2021-01-06 22:54:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136566845] [2021-01-06 22:54:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136566845] [2021-01-06 22:54:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813242694] [2021-01-06 22:54:26,078 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:26,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:26,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:26,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:26,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657398766] [2021-01-06 22:54:26,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:26,302 INFO L87 Difference]: Start difference. First operand 180 states and 491 transitions. Second operand 18 states. [2021-01-06 22:54:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:26,905 INFO L93 Difference]: Finished difference Result 266 states and 661 transitions. [2021-01-06 22:54:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:26,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:26,908 INFO L225 Difference]: With dead ends: 266 [2021-01-06 22:54:26,908 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 22:54:26,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 22:54:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 182. [2021-01-06 22:54:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 498 transitions. [2021-01-06 22:54:26,912 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 498 transitions. Word has length 14 [2021-01-06 22:54:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:26,913 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 498 transitions. [2021-01-06 22:54:26,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 498 transitions. [2021-01-06 22:54:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:26,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:26,913 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:27,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:27,116 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 585200081, now seen corresponding path program 101 times [2021-01-06 22:54:27,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:27,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721575097] [2021-01-06 22:54:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721575097] [2021-01-06 22:54:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067274988] [2021-01-06 22:54:27,228 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:27,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:27,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:27,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:27,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151663748] [2021-01-06 22:54:27,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:27,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:27,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:27,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:27,473 INFO L87 Difference]: Start difference. First operand 182 states and 498 transitions. Second operand 18 states. [2021-01-06 22:54:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:28,112 INFO L93 Difference]: Finished difference Result 259 states and 648 transitions. [2021-01-06 22:54:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:28,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:28,116 INFO L225 Difference]: With dead ends: 259 [2021-01-06 22:54:28,116 INFO L226 Difference]: Without dead ends: 257 [2021-01-06 22:54:28,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-01-06 22:54:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 184. [2021-01-06 22:54:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 505 transitions. [2021-01-06 22:54:28,121 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 505 transitions. Word has length 14 [2021-01-06 22:54:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:28,122 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 505 transitions. [2021-01-06 22:54:28,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 505 transitions. [2021-01-06 22:54:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:28,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:28,122 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:28,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-01-06 22:54:28,325 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 585219549, now seen corresponding path program 102 times [2021-01-06 22:54:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350548252] [2021-01-06 22:54:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:28,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350548252] [2021-01-06 22:54:28,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594194291] [2021-01-06 22:54:28,439 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:28,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:54:28,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:54:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:28,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:28,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 22:54:28,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478142041] [2021-01-06 22:54:28,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:54:28,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:54:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:54:28,659 INFO L87 Difference]: Start difference. First operand 184 states and 505 transitions. Second operand 16 states. [2021-01-06 22:54:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:29,464 INFO L93 Difference]: Finished difference Result 287 states and 718 transitions. [2021-01-06 22:54:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:54:29,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2021-01-06 22:54:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:29,466 INFO L225 Difference]: With dead ends: 287 [2021-01-06 22:54:29,466 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 22:54:29,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 22:54:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 184. [2021-01-06 22:54:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 505 transitions. [2021-01-06 22:54:29,470 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 505 transitions. Word has length 14 [2021-01-06 22:54:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:29,471 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 505 transitions. [2021-01-06 22:54:29,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:54:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 505 transitions. [2021-01-06 22:54:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:29,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:29,471 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:29,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:29,672 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash 585221471, now seen corresponding path program 103 times [2021-01-06 22:54:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:29,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012064414] [2021-01-06 22:54:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:29,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012064414] [2021-01-06 22:54:29,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293156341] [2021-01-06 22:54:29,788 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:29,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:29,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:30,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:30,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:30,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907441512] [2021-01-06 22:54:30,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:30,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:30,010 INFO L87 Difference]: Start difference. First operand 184 states and 505 transitions. Second operand 18 states. [2021-01-06 22:54:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:30,907 INFO L93 Difference]: Finished difference Result 330 states and 818 transitions. [2021-01-06 22:54:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:30,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:30,909 INFO L225 Difference]: With dead ends: 330 [2021-01-06 22:54:30,909 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 22:54:30,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=1180, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:54:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 22:54:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 172. [2021-01-06 22:54:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:54:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 475 transitions. [2021-01-06 22:54:30,914 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 475 transitions. Word has length 14 [2021-01-06 22:54:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:30,914 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 475 transitions. [2021-01-06 22:54:30,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 475 transitions. [2021-01-06 22:54:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:30,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:30,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:31,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-01-06 22:54:31,129 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1128994707, now seen corresponding path program 104 times [2021-01-06 22:54:31,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:31,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091955169] [2021-01-06 22:54:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:31,242 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 22:54:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091955169] [2021-01-06 22:54:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521187108] [2021-01-06 22:54:31,242 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:31,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:31,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:31,521 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 22:54:31,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:31,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:31,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291991001] [2021-01-06 22:54:31,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:31,522 INFO L87 Difference]: Start difference. First operand 172 states and 475 transitions. Second operand 18 states. [2021-01-06 22:54:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:31,888 INFO L93 Difference]: Finished difference Result 249 states and 632 transitions. [2021-01-06 22:54:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:54:31,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:31,891 INFO L225 Difference]: With dead ends: 249 [2021-01-06 22:54:31,891 INFO L226 Difference]: Without dead ends: 247 [2021-01-06 22:54:31,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:54:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-01-06 22:54:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 176. [2021-01-06 22:54:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 486 transitions. [2021-01-06 22:54:31,895 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 486 transitions. Word has length 14 [2021-01-06 22:54:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:31,895 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 486 transitions. [2021-01-06 22:54:31,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 486 transitions. [2021-01-06 22:54:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:31,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:31,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:32,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:32,096 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1130839827, now seen corresponding path program 105 times [2021-01-06 22:54:32,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:32,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114742952] [2021-01-06 22:54:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:32,213 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 22:54:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114742952] [2021-01-06 22:54:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637197219] [2021-01-06 22:54:32,214 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:32,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:32,448 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 22:54:32,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:32,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054354557] [2021-01-06 22:54:32,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:32,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:32,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:32,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:32,450 INFO L87 Difference]: Start difference. First operand 176 states and 486 transitions. Second operand 18 states. [2021-01-06 22:54:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:32,825 INFO L93 Difference]: Finished difference Result 256 states and 645 transitions. [2021-01-06 22:54:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:54:32,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:32,827 INFO L225 Difference]: With dead ends: 256 [2021-01-06 22:54:32,827 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 22:54:32,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 22:54:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 179. [2021-01-06 22:54:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 494 transitions. [2021-01-06 22:54:32,831 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 494 transitions. Word has length 14 [2021-01-06 22:54:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:32,831 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 494 transitions. [2021-01-06 22:54:32,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 494 transitions. [2021-01-06 22:54:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:32,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:32,831 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:33,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-01-06 22:54:33,036 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841749, now seen corresponding path program 106 times [2021-01-06 22:54:33,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:33,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603736646] [2021-01-06 22:54:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:33,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603736646] [2021-01-06 22:54:33,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946360018] [2021-01-06 22:54:33,157 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:33,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:33,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:33,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582512359] [2021-01-06 22:54:33,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:33,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:33,401 INFO L87 Difference]: Start difference. First operand 179 states and 494 transitions. Second operand 18 states. [2021-01-06 22:54:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:33,778 INFO L93 Difference]: Finished difference Result 260 states and 654 transitions. [2021-01-06 22:54:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:54:33,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:33,780 INFO L225 Difference]: With dead ends: 260 [2021-01-06 22:54:33,780 INFO L226 Difference]: Without dead ends: 258 [2021-01-06 22:54:33,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-01-06 22:54:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 180. [2021-01-06 22:54:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 496 transitions. [2021-01-06 22:54:33,784 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 496 transitions. Word has length 14 [2021-01-06 22:54:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:33,784 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 496 transitions. [2021-01-06 22:54:33,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 496 transitions. [2021-01-06 22:54:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:33,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:33,785 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:33,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:33,986 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1130899409, now seen corresponding path program 107 times [2021-01-06 22:54:33,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:33,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562036127] [2021-01-06 22:54:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:34,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562036127] [2021-01-06 22:54:34,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584207783] [2021-01-06 22:54:34,107 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:34,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:54:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:34,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:34,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:34,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596086012] [2021-01-06 22:54:34,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:34,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:34,370 INFO L87 Difference]: Start difference. First operand 180 states and 496 transitions. Second operand 18 states. [2021-01-06 22:54:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:34,774 INFO L93 Difference]: Finished difference Result 254 states and 644 transitions. [2021-01-06 22:54:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:54:34,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:34,777 INFO L225 Difference]: With dead ends: 254 [2021-01-06 22:54:34,777 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 22:54:34,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 22:54:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 181. [2021-01-06 22:54:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 498 transitions. [2021-01-06 22:54:34,781 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 498 transitions. Word has length 14 [2021-01-06 22:54:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:34,781 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 498 transitions. [2021-01-06 22:54:34,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 498 transitions. [2021-01-06 22:54:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:34,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:34,781 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:34,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-01-06 22:54:34,983 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:34,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1186310669, now seen corresponding path program 108 times [2021-01-06 22:54:34,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:34,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777166712] [2021-01-06 22:54:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777166712] [2021-01-06 22:54:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267538465] [2021-01-06 22:54:35,099 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:35,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:35,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:35,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:35,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:35,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911997991] [2021-01-06 22:54:35,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:35,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:35,437 INFO L87 Difference]: Start difference. First operand 181 states and 498 transitions. Second operand 18 states. [2021-01-06 22:54:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:35,811 INFO L93 Difference]: Finished difference Result 251 states and 635 transitions. [2021-01-06 22:54:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:54:35,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:35,812 INFO L225 Difference]: With dead ends: 251 [2021-01-06 22:54:35,813 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 22:54:35,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:54:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 22:54:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-01-06 22:54:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 492 transitions. [2021-01-06 22:54:35,816 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 492 transitions. Word has length 14 [2021-01-06 22:54:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:35,816 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 492 transitions. [2021-01-06 22:54:35,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 492 transitions. [2021-01-06 22:54:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:35,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:35,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:36,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-01-06 22:54:36,018 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:36,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1733566455, now seen corresponding path program 109 times [2021-01-06 22:54:36,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:36,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308040723] [2021-01-06 22:54:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:36,125 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 22:54:36,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308040723] [2021-01-06 22:54:36,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403416890] [2021-01-06 22:54:36,125 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:36,369 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 22:54:36,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:36,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940916438] [2021-01-06 22:54:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:36,371 INFO L87 Difference]: Start difference. First operand 179 states and 492 transitions. Second operand 18 states. [2021-01-06 22:54:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:36,803 INFO L93 Difference]: Finished difference Result 269 states and 674 transitions. [2021-01-06 22:54:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:36,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:36,805 INFO L225 Difference]: With dead ends: 269 [2021-01-06 22:54:36,806 INFO L226 Difference]: Without dead ends: 267 [2021-01-06 22:54:36,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-01-06 22:54:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2021-01-06 22:54:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 495 transitions. [2021-01-06 22:54:36,810 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 495 transitions. Word has length 14 [2021-01-06 22:54:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:36,810 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 495 transitions. [2021-01-06 22:54:36,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 495 transitions. [2021-01-06 22:54:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:36,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:36,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:37,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-01-06 22:54:37,026 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1735411575, now seen corresponding path program 110 times [2021-01-06 22:54:37,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:37,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455684243] [2021-01-06 22:54:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:37,130 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 22:54:37,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455684243] [2021-01-06 22:54:37,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143349074] [2021-01-06 22:54:37,131 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:37,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:37,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:37,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:37,391 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 22:54:37,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:37,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406058909] [2021-01-06 22:54:37,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:37,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:37,392 INFO L87 Difference]: Start difference. First operand 180 states and 495 transitions. Second operand 18 states. [2021-01-06 22:54:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:37,916 INFO L93 Difference]: Finished difference Result 274 states and 681 transitions. [2021-01-06 22:54:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:54:37,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:37,918 INFO L225 Difference]: With dead ends: 274 [2021-01-06 22:54:37,918 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 22:54:37,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:54:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 22:54:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 183. [2021-01-06 22:54:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 22:54:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 503 transitions. [2021-01-06 22:54:37,922 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 503 transitions. Word has length 14 [2021-01-06 22:54:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:37,922 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 503 transitions. [2021-01-06 22:54:37,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 503 transitions. [2021-01-06 22:54:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:37,922 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:37,923 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:38,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:38,124 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1735413497, now seen corresponding path program 111 times [2021-01-06 22:54:38,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:38,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877264222] [2021-01-06 22:54:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:38,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877264222] [2021-01-06 22:54:38,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789395909] [2021-01-06 22:54:38,240 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:38,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:38,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:38,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:38,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961151404] [2021-01-06 22:54:38,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:38,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:38,494 INFO L87 Difference]: Start difference. First operand 183 states and 503 transitions. Second operand 18 states. [2021-01-06 22:54:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:38,916 INFO L93 Difference]: Finished difference Result 276 states and 688 transitions. [2021-01-06 22:54:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:54:38,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:38,918 INFO L225 Difference]: With dead ends: 276 [2021-01-06 22:54:38,918 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 22:54:38,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 22:54:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 184. [2021-01-06 22:54:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 505 transitions. [2021-01-06 22:54:38,922 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 505 transitions. Word has length 14 [2021-01-06 22:54:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:38,922 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 505 transitions. [2021-01-06 22:54:38,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 505 transitions. [2021-01-06 22:54:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:38,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:38,923 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:39,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:39,127 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1735471157, now seen corresponding path program 112 times [2021-01-06 22:54:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:39,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401524093] [2021-01-06 22:54:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:39,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401524093] [2021-01-06 22:54:39,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950298959] [2021-01-06 22:54:39,245 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:39,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:39,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:39,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:39,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:39,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207565597] [2021-01-06 22:54:39,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:39,518 INFO L87 Difference]: Start difference. First operand 184 states and 505 transitions. Second operand 18 states. [2021-01-06 22:54:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:40,039 INFO L93 Difference]: Finished difference Result 270 states and 678 transitions. [2021-01-06 22:54:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:54:40,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:40,042 INFO L225 Difference]: With dead ends: 270 [2021-01-06 22:54:40,042 INFO L226 Difference]: Without dead ends: 268 [2021-01-06 22:54:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:54:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-01-06 22:54:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 182. [2021-01-06 22:54:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 500 transitions. [2021-01-06 22:54:40,048 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 500 transitions. Word has length 14 [2021-01-06 22:54:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:40,048 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 500 transitions. [2021-01-06 22:54:40,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 500 transitions. [2021-01-06 22:54:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:40,049 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:40,049 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:40,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-01-06 22:54:40,262 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1790882417, now seen corresponding path program 113 times [2021-01-06 22:54:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:40,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331479109] [2021-01-06 22:54:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:40,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331479109] [2021-01-06 22:54:40,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499121630] [2021-01-06 22:54:40,378 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:40,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:40,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:40,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:40,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089187279] [2021-01-06 22:54:40,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:40,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:40,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:40,684 INFO L87 Difference]: Start difference. First operand 182 states and 500 transitions. Second operand 18 states. [2021-01-06 22:54:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:41,142 INFO L93 Difference]: Finished difference Result 264 states and 661 transitions. [2021-01-06 22:54:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:41,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:41,144 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:54:41,144 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:54:41,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:54:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2021-01-06 22:54:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 487 transitions. [2021-01-06 22:54:41,149 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 487 transitions. Word has length 14 [2021-01-06 22:54:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 487 transitions. [2021-01-06 22:54:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 487 transitions. [2021-01-06 22:54:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:41,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:41,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:41,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-01-06 22:54:41,351 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:41,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1704904895, now seen corresponding path program 114 times [2021-01-06 22:54:41,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:41,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144548153] [2021-01-06 22:54:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:41,464 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 22:54:41,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144548153] [2021-01-06 22:54:41,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967710887] [2021-01-06 22:54:41,465 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:41,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:41,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:41,750 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 22:54:41,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439255459] [2021-01-06 22:54:41,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:41,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:41,751 INFO L87 Difference]: Start difference. First operand 177 states and 487 transitions. Second operand 18 states. [2021-01-06 22:54:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:42,202 INFO L93 Difference]: Finished difference Result 264 states and 660 transitions. [2021-01-06 22:54:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:42,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:42,204 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:54:42,204 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:54:42,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:54:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2021-01-06 22:54:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 487 transitions. [2021-01-06 22:54:42,208 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 487 transitions. Word has length 14 [2021-01-06 22:54:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:42,208 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 487 transitions. [2021-01-06 22:54:42,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 487 transitions. [2021-01-06 22:54:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:42,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:42,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:42,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:42,410 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1703059775, now seen corresponding path program 115 times [2021-01-06 22:54:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:42,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170949433] [2021-01-06 22:54:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:42,529 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 22:54:42,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170949433] [2021-01-06 22:54:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177128350] [2021-01-06 22:54:42,530 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:42,821 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 22:54:42,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:42,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:42,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540386311] [2021-01-06 22:54:42,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:42,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:42,822 INFO L87 Difference]: Start difference. First operand 177 states and 487 transitions. Second operand 18 states. [2021-01-06 22:54:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:43,331 INFO L93 Difference]: Finished difference Result 275 states and 676 transitions. [2021-01-06 22:54:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:43,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:43,333 INFO L225 Difference]: With dead ends: 275 [2021-01-06 22:54:43,333 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 22:54:43,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 22:54:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 177. [2021-01-06 22:54:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 487 transitions. [2021-01-06 22:54:43,337 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 487 transitions. Word has length 14 [2021-01-06 22:54:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:43,337 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 487 transitions. [2021-01-06 22:54:43,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 487 transitions. [2021-01-06 22:54:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:43,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:43,338 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:43,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:43,539 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1703057853, now seen corresponding path program 116 times [2021-01-06 22:54:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:43,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064768119] [2021-01-06 22:54:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:43,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064768119] [2021-01-06 22:54:43,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66807952] [2021-01-06 22:54:43,657 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:43,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:43,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:43,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729290772] [2021-01-06 22:54:43,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:43,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:43,927 INFO L87 Difference]: Start difference. First operand 177 states and 487 transitions. Second operand 18 states. [2021-01-06 22:54:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:44,396 INFO L93 Difference]: Finished difference Result 276 states and 680 transitions. [2021-01-06 22:54:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:44,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:44,398 INFO L225 Difference]: With dead ends: 276 [2021-01-06 22:54:44,399 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 22:54:44,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 22:54:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 179. [2021-01-06 22:54:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 492 transitions. [2021-01-06 22:54:44,402 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 492 transitions. Word has length 14 [2021-01-06 22:54:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:44,403 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 492 transitions. [2021-01-06 22:54:44,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 492 transitions. [2021-01-06 22:54:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:44,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:44,403 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:44,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:44,604 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1703000193, now seen corresponding path program 117 times [2021-01-06 22:54:44,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:44,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334654065] [2021-01-06 22:54:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:44,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334654065] [2021-01-06 22:54:44,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206201134] [2021-01-06 22:54:44,727 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:44,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:54:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:45,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:45,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:45,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212300413] [2021-01-06 22:54:45,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:45,009 INFO L87 Difference]: Start difference. First operand 179 states and 492 transitions. Second operand 18 states. [2021-01-06 22:54:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:45,566 INFO L93 Difference]: Finished difference Result 278 states and 685 transitions. [2021-01-06 22:54:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:45,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:45,569 INFO L225 Difference]: With dead ends: 278 [2021-01-06 22:54:45,569 INFO L226 Difference]: Without dead ends: 276 [2021-01-06 22:54:45,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-01-06 22:54:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 176. [2021-01-06 22:54:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 484 transitions. [2021-01-06 22:54:45,572 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 484 transitions. Word has length 14 [2021-01-06 22:54:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:45,573 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 484 transitions. [2021-01-06 22:54:45,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 484 transitions. [2021-01-06 22:54:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:45,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:45,573 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-01-06 22:54:45,774 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1123086665, now seen corresponding path program 118 times [2021-01-06 22:54:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:45,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141638020] [2021-01-06 22:54:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:45,889 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 22:54:45,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141638020] [2021-01-06 22:54:45,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44169981] [2021-01-06 22:54:45,890 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:45,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:46,146 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 22:54:46,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:46,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:46,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390564048] [2021-01-06 22:54:46,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:46,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:46,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:46,148 INFO L87 Difference]: Start difference. First operand 176 states and 484 transitions. Second operand 18 states. [2021-01-06 22:54:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:46,674 INFO L93 Difference]: Finished difference Result 280 states and 683 transitions. [2021-01-06 22:54:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:46,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:46,676 INFO L225 Difference]: With dead ends: 280 [2021-01-06 22:54:46,676 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 22:54:46,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 22:54:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 175. [2021-01-06 22:54:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 481 transitions. [2021-01-06 22:54:46,680 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 481 transitions. Word has length 14 [2021-01-06 22:54:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:46,680 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 481 transitions. [2021-01-06 22:54:46,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 481 transitions. [2021-01-06 22:54:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:46,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:46,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:46,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-01-06 22:54:46,881 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1104318335, now seen corresponding path program 119 times [2021-01-06 22:54:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:46,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459148866] [2021-01-06 22:54:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:46,989 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 22:54:46,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459148866] [2021-01-06 22:54:46,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909739967] [2021-01-06 22:54:46,990 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:47,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:47,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:47,263 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 22:54:47,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:47,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409489194] [2021-01-06 22:54:47,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:47,265 INFO L87 Difference]: Start difference. First operand 175 states and 481 transitions. Second operand 18 states. [2021-01-06 22:54:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:47,880 INFO L93 Difference]: Finished difference Result 275 states and 672 transitions. [2021-01-06 22:54:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:47,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:47,882 INFO L225 Difference]: With dead ends: 275 [2021-01-06 22:54:47,882 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 22:54:47,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:54:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 22:54:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 176. [2021-01-06 22:54:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 483 transitions. [2021-01-06 22:54:47,886 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 483 transitions. Word has length 14 [2021-01-06 22:54:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:47,886 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 483 transitions. [2021-01-06 22:54:47,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 483 transitions. [2021-01-06 22:54:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:47,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:47,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:48,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-01-06 22:54:48,087 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1103655245, now seen corresponding path program 120 times [2021-01-06 22:54:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:48,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365764316] [2021-01-06 22:54:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:48,196 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 22:54:48,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365764316] [2021-01-06 22:54:48,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562510642] [2021-01-06 22:54:48,197 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:48,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:48,449 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 22:54:48,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610057012] [2021-01-06 22:54:48,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:48,451 INFO L87 Difference]: Start difference. First operand 176 states and 483 transitions. Second operand 18 states. [2021-01-06 22:54:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:49,189 INFO L93 Difference]: Finished difference Result 289 states and 712 transitions. [2021-01-06 22:54:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:49,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:49,192 INFO L225 Difference]: With dead ends: 289 [2021-01-06 22:54:49,192 INFO L226 Difference]: Without dead ends: 287 [2021-01-06 22:54:49,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-01-06 22:54:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 178. [2021-01-06 22:54:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 490 transitions. [2021-01-06 22:54:49,197 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 490 transitions. Word has length 14 [2021-01-06 22:54:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:49,198 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 490 transitions. [2021-01-06 22:54:49,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 490 transitions. [2021-01-06 22:54:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:49,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:49,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:49,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-01-06 22:54:49,414 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:49,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1103633855, now seen corresponding path program 121 times [2021-01-06 22:54:49,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:49,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231928541] [2021-01-06 22:54:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:49,534 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 22:54:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231928541] [2021-01-06 22:54:49,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091859829] [2021-01-06 22:54:49,535 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:49,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:49,769 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:49,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:49,803 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 22:54:49,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:49,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:49,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620534380] [2021-01-06 22:54:49,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:49,805 INFO L87 Difference]: Start difference. First operand 178 states and 490 transitions. Second operand 18 states. [2021-01-06 22:54:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:51,078 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2021-01-06 22:54:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 22:54:51,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:51,081 INFO L225 Difference]: With dead ends: 365 [2021-01-06 22:54:51,081 INFO L226 Difference]: Without dead ends: 353 [2021-01-06 22:54:51,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=545, Invalid=1347, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-01-06 22:54:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 176. [2021-01-06 22:54:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 482 transitions. [2021-01-06 22:54:51,086 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 482 transitions. Word has length 14 [2021-01-06 22:54:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:51,086 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 482 transitions. [2021-01-06 22:54:51,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 482 transitions. [2021-01-06 22:54:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:51,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:51,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:51,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-01-06 22:54:51,295 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1065830285, now seen corresponding path program 122 times [2021-01-06 22:54:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:51,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586114269] [2021-01-06 22:54:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:51,425 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 22:54:51,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586114269] [2021-01-06 22:54:51,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371778107] [2021-01-06 22:54:51,426 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:51,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:51,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:51,652 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 22:54:51,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:51,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228176232] [2021-01-06 22:54:51,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:51,654 INFO L87 Difference]: Start difference. First operand 176 states and 482 transitions. Second operand 18 states. [2021-01-06 22:54:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:52,415 INFO L93 Difference]: Finished difference Result 309 states and 747 transitions. [2021-01-06 22:54:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:52,416 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:52,417 INFO L225 Difference]: With dead ends: 309 [2021-01-06 22:54:52,418 INFO L226 Difference]: Without dead ends: 307 [2021-01-06 22:54:52,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-01-06 22:54:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 179. [2021-01-06 22:54:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 495 transitions. [2021-01-06 22:54:52,422 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 495 transitions. Word has length 14 [2021-01-06 22:54:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:52,422 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 495 transitions. [2021-01-06 22:54:52,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 495 transitions. [2021-01-06 22:54:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:52,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:52,422 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:52,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-01-06 22:54:52,624 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1065828363, now seen corresponding path program 123 times [2021-01-06 22:54:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:52,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004280498] [2021-01-06 22:54:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004280498] [2021-01-06 22:54:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679633495] [2021-01-06 22:54:52,763 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:52,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:53,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:53,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:53,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427540396] [2021-01-06 22:54:53,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:53,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:53,006 INFO L87 Difference]: Start difference. First operand 179 states and 495 transitions. Second operand 18 states. [2021-01-06 22:54:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:53,648 INFO L93 Difference]: Finished difference Result 305 states and 742 transitions. [2021-01-06 22:54:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:53,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:53,650 INFO L225 Difference]: With dead ends: 305 [2021-01-06 22:54:53,650 INFO L226 Difference]: Without dead ends: 303 [2021-01-06 22:54:53,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:54:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-01-06 22:54:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 180. [2021-01-06 22:54:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 498 transitions. [2021-01-06 22:54:53,654 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 498 transitions. Word has length 14 [2021-01-06 22:54:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:53,654 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 498 transitions. [2021-01-06 22:54:53,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 498 transitions. [2021-01-06 22:54:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:53,655 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:53,655 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:53,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:53,856 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1065770703, now seen corresponding path program 124 times [2021-01-06 22:54:53,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:53,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407274997] [2021-01-06 22:54:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407274997] [2021-01-06 22:54:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416010040] [2021-01-06 22:54:53,976 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:54,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:54,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:54,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:54,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370629827] [2021-01-06 22:54:54,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:54,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:54,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:54,245 INFO L87 Difference]: Start difference. First operand 180 states and 498 transitions. Second operand 18 states. [2021-01-06 22:54:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:55,000 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-01-06 22:54:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:55,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:55,002 INFO L225 Difference]: With dead ends: 295 [2021-01-06 22:54:55,002 INFO L226 Difference]: Without dead ends: 293 [2021-01-06 22:54:55,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-01-06 22:54:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 179. [2021-01-06 22:54:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 496 transitions. [2021-01-06 22:54:55,007 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 496 transitions. Word has length 14 [2021-01-06 22:54:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:55,007 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 496 transitions. [2021-01-06 22:54:55,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 496 transitions. [2021-01-06 22:54:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:55,008 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:55,008 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:55,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-01-06 22:54:55,211 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:55,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1047061955, now seen corresponding path program 125 times [2021-01-06 22:54:55,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:55,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962806954] [2021-01-06 22:54:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:55,327 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 22:54:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962806954] [2021-01-06 22:54:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772592177] [2021-01-06 22:54:55,329 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:55,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:55,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:55,602 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 22:54:55,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:55,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415725900] [2021-01-06 22:54:55,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:55,604 INFO L87 Difference]: Start difference. First operand 179 states and 496 transitions. Second operand 18 states. [2021-01-06 22:54:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:56,552 INFO L93 Difference]: Finished difference Result 314 states and 757 transitions. [2021-01-06 22:54:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:54:56,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:56,554 INFO L225 Difference]: With dead ends: 314 [2021-01-06 22:54:56,554 INFO L226 Difference]: Without dead ends: 312 [2021-01-06 22:54:56,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:54:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-01-06 22:54:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 181. [2021-01-06 22:54:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 506 transitions. [2021-01-06 22:54:56,558 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 506 transitions. Word has length 14 [2021-01-06 22:54:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:56,559 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 506 transitions. [2021-01-06 22:54:56,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 506 transitions. [2021-01-06 22:54:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:56,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:56,559 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:56,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:56,760 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:56,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1047060033, now seen corresponding path program 126 times [2021-01-06 22:54:56,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:56,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911362297] [2021-01-06 22:54:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:56,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911362297] [2021-01-06 22:54:56,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842773394] [2021-01-06 22:54:56,881 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:56,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:57,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:57,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230743878] [2021-01-06 22:54:57,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:57,156 INFO L87 Difference]: Start difference. First operand 181 states and 506 transitions. Second operand 18 states. [2021-01-06 22:54:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:57,954 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2021-01-06 22:54:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:57,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:57,956 INFO L225 Difference]: With dead ends: 305 [2021-01-06 22:54:57,956 INFO L226 Difference]: Without dead ends: 303 [2021-01-06 22:54:57,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-01-06 22:54:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 184. [2021-01-06 22:54:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 517 transitions. [2021-01-06 22:54:57,960 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 517 transitions. Word has length 14 [2021-01-06 22:54:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:57,961 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 517 transitions. [2021-01-06 22:54:57,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 517 transitions. [2021-01-06 22:54:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:57,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:57,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:58,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:58,162 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1046456525, now seen corresponding path program 127 times [2021-01-06 22:54:58,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:58,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629203471] [2021-01-06 22:54:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:58,287 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 22:54:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629203471] [2021-01-06 22:54:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845319592] [2021-01-06 22:54:58,287 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:58,561 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 22:54:58,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:58,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:58,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778800095] [2021-01-06 22:54:58,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:58,563 INFO L87 Difference]: Start difference. First operand 184 states and 517 transitions. Second operand 18 states. [2021-01-06 22:54:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:59,570 INFO L93 Difference]: Finished difference Result 306 states and 751 transitions. [2021-01-06 22:54:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:59,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:59,572 INFO L225 Difference]: With dead ends: 306 [2021-01-06 22:54:59,572 INFO L226 Difference]: Without dead ends: 304 [2021-01-06 22:54:59,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=405, Invalid=1001, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:54:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-01-06 22:54:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 186. [2021-01-06 22:54:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 22:54:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 524 transitions. [2021-01-06 22:54:59,577 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 524 transitions. Word has length 14 [2021-01-06 22:54:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:59,577 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 524 transitions. [2021-01-06 22:54:59,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 524 transitions. [2021-01-06 22:54:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:59,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:59,578 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:59,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:59,779 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:59,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:59,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1046437057, now seen corresponding path program 128 times [2021-01-06 22:54:59,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:59,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923189496] [2021-01-06 22:54:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:59,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923189496] [2021-01-06 22:54:59,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101108588] [2021-01-06 22:54:59,883 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:59,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:59,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:00,106 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:00,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:00,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:00,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360815724] [2021-01-06 22:55:00,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:00,121 INFO L87 Difference]: Start difference. First operand 186 states and 524 transitions. Second operand 17 states. [2021-01-06 22:55:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:01,032 INFO L93 Difference]: Finished difference Result 303 states and 746 transitions. [2021-01-06 22:55:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:55:01,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:01,035 INFO L225 Difference]: With dead ends: 303 [2021-01-06 22:55:01,035 INFO L226 Difference]: Without dead ends: 295 [2021-01-06 22:55:01,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:55:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-01-06 22:55:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 188. [2021-01-06 22:55:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 22:55:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 530 transitions. [2021-01-06 22:55:01,040 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 530 transitions. Word has length 14 [2021-01-06 22:55:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:01,040 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 530 transitions. [2021-01-06 22:55:01,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 530 transitions. [2021-01-06 22:55:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:01,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:01,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:01,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:01,256 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1046435135, now seen corresponding path program 129 times [2021-01-06 22:55:01,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808596400] [2021-01-06 22:55:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:01,376 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 22:55:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808596400] [2021-01-06 22:55:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043662167] [2021-01-06 22:55:01,376 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:01,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:01,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:55:01,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:55:01,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:01,637 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 22:55:01,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:01,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850789537] [2021-01-06 22:55:01,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:01,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:01,639 INFO L87 Difference]: Start difference. First operand 188 states and 530 transitions. Second operand 18 states. [2021-01-06 22:55:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:03,018 INFO L93 Difference]: Finished difference Result 370 states and 909 transitions. [2021-01-06 22:55:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 22:55:03,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:03,021 INFO L225 Difference]: With dead ends: 370 [2021-01-06 22:55:03,021 INFO L226 Difference]: Without dead ends: 358 [2021-01-06 22:55:03,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:55:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-01-06 22:55:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 184. [2021-01-06 22:55:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:55:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 511 transitions. [2021-01-06 22:55:03,025 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 511 transitions. Word has length 14 [2021-01-06 22:55:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:03,025 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 511 transitions. [2021-01-06 22:55:03,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 511 transitions. [2021-01-06 22:55:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:03,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:03,026 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:03,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-01-06 22:55:03,226 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1045214913, now seen corresponding path program 130 times [2021-01-06 22:55:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761808075] [2021-01-06 22:55:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:03,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761808075] [2021-01-06 22:55:03,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590662149] [2021-01-06 22:55:03,345 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:03,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:03,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:03,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016332635] [2021-01-06 22:55:03,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:03,622 INFO L87 Difference]: Start difference. First operand 184 states and 511 transitions. Second operand 18 states. [2021-01-06 22:55:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:04,547 INFO L93 Difference]: Finished difference Result 313 states and 772 transitions. [2021-01-06 22:55:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:55:04,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:04,549 INFO L225 Difference]: With dead ends: 313 [2021-01-06 22:55:04,549 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 22:55:04,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:55:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 22:55:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 184. [2021-01-06 22:55:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:55:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 514 transitions. [2021-01-06 22:55:04,554 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 514 transitions. Word has length 14 [2021-01-06 22:55:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:04,554 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 514 transitions. [2021-01-06 22:55:04,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 514 transitions. [2021-01-06 22:55:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:04,554 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:04,554 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:04,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-01-06 22:55:04,755 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1044609483, now seen corresponding path program 131 times [2021-01-06 22:55:04,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:04,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299999736] [2021-01-06 22:55:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299999736] [2021-01-06 22:55:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6813273] [2021-01-06 22:55:04,880 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:04,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:55:04,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:05,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:05,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:05,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106016913] [2021-01-06 22:55:05,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:05,159 INFO L87 Difference]: Start difference. First operand 184 states and 514 transitions. Second operand 18 states. [2021-01-06 22:55:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:06,121 INFO L93 Difference]: Finished difference Result 295 states and 732 transitions. [2021-01-06 22:55:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:55:06,123 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:06,123 INFO L225 Difference]: With dead ends: 295 [2021-01-06 22:55:06,124 INFO L226 Difference]: Without dead ends: 293 [2021-01-06 22:55:06,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=892, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:55:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-01-06 22:55:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 186. [2021-01-06 22:55:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 22:55:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-01-06 22:55:06,128 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 14 [2021-01-06 22:55:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:06,128 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-01-06 22:55:06,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-01-06 22:55:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:06,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:06,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:06,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-01-06 22:55:06,330 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1044590015, now seen corresponding path program 132 times [2021-01-06 22:55:06,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:06,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865436780] [2021-01-06 22:55:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:06,455 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 22:55:06,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865436780] [2021-01-06 22:55:06,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366317228] [2021-01-06 22:55:06,456 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:06,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:55:06,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:55:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:06,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:06,712 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 22:55:06,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:06,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455951255] [2021-01-06 22:55:06,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:06,713 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand 17 states. [2021-01-06 22:55:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:07,987 INFO L93 Difference]: Finished difference Result 335 states and 827 transitions. [2021-01-06 22:55:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 22:55:07,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:07,989 INFO L225 Difference]: With dead ends: 335 [2021-01-06 22:55:07,989 INFO L226 Difference]: Without dead ends: 327 [2021-01-06 22:55:07,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:55:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-01-06 22:55:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 189. [2021-01-06 22:55:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 22:55:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 532 transitions. [2021-01-06 22:55:07,993 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 532 transitions. Word has length 14 [2021-01-06 22:55:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:07,993 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 532 transitions. [2021-01-06 22:55:07,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 532 transitions. [2021-01-06 22:55:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:07,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:07,994 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:08,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-01-06 22:55:08,195 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1044588093, now seen corresponding path program 133 times [2021-01-06 22:55:08,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:08,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368196939] [2021-01-06 22:55:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:08,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368196939] [2021-01-06 22:55:08,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160681465] [2021-01-06 22:55:08,334 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:08,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:55:08,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:55:08,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:08,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:08,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011347370] [2021-01-06 22:55:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:08,654 INFO L87 Difference]: Start difference. First operand 189 states and 532 transitions. Second operand 18 states. [2021-01-06 22:55:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:09,973 INFO L93 Difference]: Finished difference Result 371 states and 906 transitions. [2021-01-06 22:55:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:55:09,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:09,975 INFO L225 Difference]: With dead ends: 371 [2021-01-06 22:55:09,975 INFO L226 Difference]: Without dead ends: 359 [2021-01-06 22:55:09,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=535, Invalid=1271, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:55:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-01-06 22:55:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 181. [2021-01-06 22:55:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:55:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 497 transitions. [2021-01-06 22:55:09,980 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 497 transitions. Word has length 14 [2021-01-06 22:55:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:09,980 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 497 transitions. [2021-01-06 22:55:09,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 497 transitions. [2021-01-06 22:55:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:09,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:09,981 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:10,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:10,184 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 70160127, now seen corresponding path program 134 times [2021-01-06 22:55:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:10,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091070762] [2021-01-06 22:55:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091070762] [2021-01-06 22:55:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954490430] [2021-01-06 22:55:10,297 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:10,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:10,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:10,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:10,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:10,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417177044] [2021-01-06 22:55:10,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:10,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:10,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:10,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:10,662 INFO L87 Difference]: Start difference. First operand 181 states and 497 transitions. Second operand 18 states. [2021-01-06 22:55:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:11,202 INFO L93 Difference]: Finished difference Result 274 states and 684 transitions. [2021-01-06 22:55:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:55:11,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:11,204 INFO L225 Difference]: With dead ends: 274 [2021-01-06 22:55:11,204 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 22:55:11,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:55:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 22:55:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 179. [2021-01-06 22:55:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:55:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 492 transitions. [2021-01-06 22:55:11,209 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 492 transitions. Word has length 14 [2021-01-06 22:55:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:11,209 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 492 transitions. [2021-01-06 22:55:11,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 492 transitions. [2021-01-06 22:55:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:11,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:11,210 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:11,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-01-06 22:55:11,413 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash 651978357, now seen corresponding path program 135 times [2021-01-06 22:55:11,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:11,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525724230] [2021-01-06 22:55:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525724230] [2021-01-06 22:55:11,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020807372] [2021-01-06 22:55:11,537 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:11,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:11,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:11,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:11,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:11,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102425630] [2021-01-06 22:55:11,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:11,909 INFO L87 Difference]: Start difference. First operand 179 states and 492 transitions. Second operand 18 states. [2021-01-06 22:55:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:12,535 INFO L93 Difference]: Finished difference Result 280 states and 688 transitions. [2021-01-06 22:55:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:55:12,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:12,538 INFO L225 Difference]: With dead ends: 280 [2021-01-06 22:55:12,538 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 22:55:12,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:55:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 22:55:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2021-01-06 22:55:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:55:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 489 transitions. [2021-01-06 22:55:12,542 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 489 transitions. Word has length 14 [2021-01-06 22:55:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:12,542 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 489 transitions. [2021-01-06 22:55:12,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 489 transitions. [2021-01-06 22:55:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:12,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:12,543 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:12,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:12,743 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:12,744 INFO L82 PathProgramCache]: Analyzing trace with hash 672534147, now seen corresponding path program 136 times [2021-01-06 22:55:12,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:12,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241303300] [2021-01-06 22:55:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:12,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241303300] [2021-01-06 22:55:12,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469270365] [2021-01-06 22:55:12,870 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:12,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:12,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:13,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:13,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085808794] [2021-01-06 22:55:13,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:13,231 INFO L87 Difference]: Start difference. First operand 178 states and 489 transitions. Second operand 18 states. [2021-01-06 22:55:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:14,051 INFO L93 Difference]: Finished difference Result 291 states and 710 transitions. [2021-01-06 22:55:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:55:14,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:14,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:14,053 INFO L225 Difference]: With dead ends: 291 [2021-01-06 22:55:14,053 INFO L226 Difference]: Without dead ends: 289 [2021-01-06 22:55:14,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-01-06 22:55:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 178. [2021-01-06 22:55:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:55:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 489 transitions. [2021-01-06 22:55:14,057 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 489 transitions. Word has length 14 [2021-01-06 22:55:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:14,057 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 489 transitions. [2021-01-06 22:55:14,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 489 transitions. [2021-01-06 22:55:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:14,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:14,057 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:14,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:14,258 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 673139577, now seen corresponding path program 137 times [2021-01-06 22:55:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:14,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828800152] [2021-01-06 22:55:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:14,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828800152] [2021-01-06 22:55:14,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324260390] [2021-01-06 22:55:14,394 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:14,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:14,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:14,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:14,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:14,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:14,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203756348] [2021-01-06 22:55:14,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:14,782 INFO L87 Difference]: Start difference. First operand 178 states and 489 transitions. Second operand 18 states. [2021-01-06 22:55:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:15,790 INFO L93 Difference]: Finished difference Result 300 states and 743 transitions. [2021-01-06 22:55:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:55:15,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:15,792 INFO L225 Difference]: With dead ends: 300 [2021-01-06 22:55:15,792 INFO L226 Difference]: Without dead ends: 298 [2021-01-06 22:55:15,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:55:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-01-06 22:55:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 180. [2021-01-06 22:55:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:55:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 496 transitions. [2021-01-06 22:55:15,798 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 496 transitions. Word has length 14 [2021-01-06 22:55:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:15,798 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 496 transitions. [2021-01-06 22:55:15,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 496 transitions. [2021-01-06 22:55:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:15,799 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:15,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:16,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:16,002 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash 673159045, now seen corresponding path program 138 times [2021-01-06 22:55:16,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:16,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573183568] [2021-01-06 22:55:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:16,132 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 22:55:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573183568] [2021-01-06 22:55:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734868421] [2021-01-06 22:55:16,133 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:16,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:55:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:55:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:16,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:16,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:55:16,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:16,456 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 22:55:16,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:16,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667185783] [2021-01-06 22:55:16,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:16,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:16,457 INFO L87 Difference]: Start difference. First operand 180 states and 496 transitions. Second operand 17 states. [2021-01-06 22:55:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:17,624 INFO L93 Difference]: Finished difference Result 313 states and 768 transitions. [2021-01-06 22:55:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:55:17,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:17,626 INFO L225 Difference]: With dead ends: 313 [2021-01-06 22:55:17,626 INFO L226 Difference]: Without dead ends: 305 [2021-01-06 22:55:17,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:55:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-01-06 22:55:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 181. [2021-01-06 22:55:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:55:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 501 transitions. [2021-01-06 22:55:17,630 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 501 transitions. Word has length 14 [2021-01-06 22:55:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:17,631 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 501 transitions. [2021-01-06 22:55:17,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 501 transitions. [2021-01-06 22:55:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:17,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:17,631 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:17,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-01-06 22:55:17,832 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 673160967, now seen corresponding path program 139 times [2021-01-06 22:55:17,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:17,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497033071] [2021-01-06 22:55:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:17,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497033071] [2021-01-06 22:55:17,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923433939] [2021-01-06 22:55:17,976 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:18,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:55:18,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:55:18,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:18,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:18,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:18,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546649624] [2021-01-06 22:55:18,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:18,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:18,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:18,382 INFO L87 Difference]: Start difference. First operand 181 states and 501 transitions. Second operand 18 states. [2021-01-06 22:55:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:19,763 INFO L93 Difference]: Finished difference Result 369 states and 901 transitions. [2021-01-06 22:55:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:55:19,765 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:55:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:19,766 INFO L225 Difference]: With dead ends: 369 [2021-01-06 22:55:19,766 INFO L226 Difference]: Without dead ends: 357 [2021-01-06 22:55:19,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:55:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-01-06 22:55:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 174. [2021-01-06 22:55:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:55:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 475 transitions. [2021-01-06 22:55:19,770 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 475 transitions. Word has length 14 [2021-01-06 22:55:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:19,771 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 475 transitions. [2021-01-06 22:55:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:55:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 475 transitions. [2021-01-06 22:55:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:19,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:19,771 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:19,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:19,972 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -375220650, now seen corresponding path program 23 times [2021-01-06 22:55:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:19,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55913243] [2021-01-06 22:55:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:20,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55913243] [2021-01-06 22:55:20,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665690320] [2021-01-06 22:55:20,049 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:20,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:55:20,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:20,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 22:55:20,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:20,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:55:20,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-01-06 22:55:20,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634194962] [2021-01-06 22:55:20,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:55:20,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:55:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:55:20,131 INFO L87 Difference]: Start difference. First operand 174 states and 475 transitions. Second operand 9 states. [2021-01-06 22:55:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:20,173 INFO L93 Difference]: Finished difference Result 291 states and 835 transitions. [2021-01-06 22:55:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:55:20,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 22:55:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:20,176 INFO L225 Difference]: With dead ends: 291 [2021-01-06 22:55:20,176 INFO L226 Difference]: Without dead ends: 271 [2021-01-06 22:55:20,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:55:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-01-06 22:55:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-01-06 22:55:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 22:55:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 773 transitions. [2021-01-06 22:55:20,180 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 773 transitions. Word has length 14 [2021-01-06 22:55:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:20,180 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 773 transitions. [2021-01-06 22:55:20,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:55:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 773 transitions. [2021-01-06 22:55:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:20,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:20,181 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:20,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-01-06 22:55:20,382 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -906973985, now seen corresponding path program 5 times [2021-01-06 22:55:20,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:20,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284717875] [2021-01-06 22:55:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:20,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284717875] [2021-01-06 22:55:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099491832] [2021-01-06 22:55:20,475 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:20,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:55:20,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:20,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 22:55:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:20,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:55:20,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-01-06 22:55:20,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695179183] [2021-01-06 22:55:20,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:55:20,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:55:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:55:20,559 INFO L87 Difference]: Start difference. First operand 271 states and 773 transitions. Second operand 9 states. [2021-01-06 22:55:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:20,599 INFO L93 Difference]: Finished difference Result 368 states and 1047 transitions. [2021-01-06 22:55:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:55:20,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 22:55:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:20,601 INFO L225 Difference]: With dead ends: 368 [2021-01-06 22:55:20,602 INFO L226 Difference]: Without dead ends: 354 [2021-01-06 22:55:20,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:55:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-01-06 22:55:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2021-01-06 22:55:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2021-01-06 22:55:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1018 transitions. [2021-01-06 22:55:20,607 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1018 transitions. Word has length 15 [2021-01-06 22:55:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:20,607 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 1018 transitions. [2021-01-06 22:55:20,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:55:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1018 transitions. [2021-01-06 22:55:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:20,607 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:20,607 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:20,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:20,808 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1777584495, now seen corresponding path program 140 times [2021-01-06 22:55:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412199942] [2021-01-06 22:55:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:20,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412199942] [2021-01-06 22:55:20,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990789604] [2021-01-06 22:55:20,985 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:21,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:21,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:55:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:21,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:55:21,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203594902] [2021-01-06 22:55:21,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:55:21,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:55:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:55:21,097 INFO L87 Difference]: Start difference. First operand 354 states and 1018 transitions. Second operand 12 states. [2021-01-06 22:55:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:21,371 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-01-06 22:55:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:55:21,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:55:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:21,374 INFO L225 Difference]: With dead ends: 386 [2021-01-06 22:55:21,374 INFO L226 Difference]: Without dead ends: 384 [2021-01-06 22:55:21,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-01-06 22:55:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 354. [2021-01-06 22:55:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2021-01-06 22:55:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1018 transitions. [2021-01-06 22:55:21,382 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1018 transitions. Word has length 15 [2021-01-06 22:55:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:21,382 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 1018 transitions. [2021-01-06 22:55:21,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:55:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1018 transitions. [2021-01-06 22:55:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:21,383 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:21,383 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:21,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-01-06 22:55:21,590 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1777303635, now seen corresponding path program 141 times [2021-01-06 22:55:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:21,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248692322] [2021-01-06 22:55:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248692322] [2021-01-06 22:55:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13697374] [2021-01-06 22:55:21,763 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:21,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:55:21,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:55:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:21,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:21,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-06 22:55:21,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129156102] [2021-01-06 22:55:21,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:55:21,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:55:21,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:55:21,912 INFO L87 Difference]: Start difference. First operand 354 states and 1018 transitions. Second operand 14 states. [2021-01-06 22:55:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:22,411 INFO L93 Difference]: Finished difference Result 463 states and 1254 transitions. [2021-01-06 22:55:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:55:22,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2021-01-06 22:55:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:22,414 INFO L225 Difference]: With dead ends: 463 [2021-01-06 22:55:22,414 INFO L226 Difference]: Without dead ends: 455 [2021-01-06 22:55:22,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:55:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-01-06 22:55:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 351. [2021-01-06 22:55:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2021-01-06 22:55:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1018 transitions. [2021-01-06 22:55:22,421 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1018 transitions. Word has length 15 [2021-01-06 22:55:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:22,421 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 1018 transitions. [2021-01-06 22:55:22,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:55:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1018 transitions. [2021-01-06 22:55:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:22,421 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:22,421 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:22,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-01-06 22:55:22,622 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash -915650353, now seen corresponding path program 142 times [2021-01-06 22:55:22,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:22,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988167814] [2021-01-06 22:55:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:22,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988167814] [2021-01-06 22:55:22,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513370923] [2021-01-06 22:55:22,800 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:22,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:23,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:23,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:23,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331742055] [2021-01-06 22:55:23,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:23,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:23,276 INFO L87 Difference]: Start difference. First operand 351 states and 1018 transitions. Second operand 19 states. [2021-01-06 22:55:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:23,997 INFO L93 Difference]: Finished difference Result 455 states and 1237 transitions. [2021-01-06 22:55:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:55:23,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:24,000 INFO L225 Difference]: With dead ends: 455 [2021-01-06 22:55:24,000 INFO L226 Difference]: Without dead ends: 451 [2021-01-06 22:55:24,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:55:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-01-06 22:55:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 356. [2021-01-06 22:55:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2021-01-06 22:55:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1027 transitions. [2021-01-06 22:55:24,008 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1027 transitions. Word has length 15 [2021-01-06 22:55:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:24,009 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 1027 transitions. [2021-01-06 22:55:24,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1027 transitions. [2021-01-06 22:55:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:24,009 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:24,009 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:24,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:24,225 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -645743893, now seen corresponding path program 143 times [2021-01-06 22:55:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:24,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433848196] [2021-01-06 22:55:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433848196] [2021-01-06 22:55:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324168114] [2021-01-06 22:55:24,394 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:24,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:24,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:24,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:24,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:24,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902627551] [2021-01-06 22:55:24,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:24,790 INFO L87 Difference]: Start difference. First operand 356 states and 1027 transitions. Second operand 19 states. [2021-01-06 22:55:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:25,545 INFO L93 Difference]: Finished difference Result 463 states and 1248 transitions. [2021-01-06 22:55:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:25,546 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:25,547 INFO L225 Difference]: With dead ends: 463 [2021-01-06 22:55:25,548 INFO L226 Difference]: Without dead ends: 459 [2021-01-06 22:55:25,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-01-06 22:55:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 358. [2021-01-06 22:55:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2021-01-06 22:55:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1034 transitions. [2021-01-06 22:55:25,554 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1034 transitions. Word has length 15 [2021-01-06 22:55:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 1034 transitions. [2021-01-06 22:55:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1034 transitions. [2021-01-06 22:55:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:25,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:25,555 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:25,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:25,768 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -645138463, now seen corresponding path program 144 times [2021-01-06 22:55:25,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982528414] [2021-01-06 22:55:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982528414] [2021-01-06 22:55:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730694288] [2021-01-06 22:55:25,937 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:25,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:55:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:55:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:26,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:26,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508652860] [2021-01-06 22:55:26,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:26,348 INFO L87 Difference]: Start difference. First operand 358 states and 1034 transitions. Second operand 19 states. [2021-01-06 22:55:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:27,251 INFO L93 Difference]: Finished difference Result 460 states and 1247 transitions. [2021-01-06 22:55:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:27,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:27,254 INFO L225 Difference]: With dead ends: 460 [2021-01-06 22:55:27,254 INFO L226 Difference]: Without dead ends: 456 [2021-01-06 22:55:27,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=721, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:55:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-01-06 22:55:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 362. [2021-01-06 22:55:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-01-06 22:55:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1048 transitions. [2021-01-06 22:55:27,262 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1048 transitions. Word has length 15 [2021-01-06 22:55:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:27,262 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 1048 transitions. [2021-01-06 22:55:27,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1048 transitions. [2021-01-06 22:55:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:27,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:27,264 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:27,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-01-06 22:55:27,478 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -645118995, now seen corresponding path program 145 times [2021-01-06 22:55:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:27,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998806504] [2021-01-06 22:55:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998806504] [2021-01-06 22:55:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871781514] [2021-01-06 22:55:27,673 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:28,064 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:28,066 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:55:28,067 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:28,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:28,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:55:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638577398] [2021-01-06 22:55:28,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:55:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:55:28,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:55:28,116 INFO L87 Difference]: Start difference. First operand 362 states and 1048 transitions. Second operand 20 states. [2021-01-06 22:55:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:29,444 INFO L93 Difference]: Finished difference Result 525 states and 1402 transitions. [2021-01-06 22:55:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:55:29,445 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:55:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:29,447 INFO L225 Difference]: With dead ends: 525 [2021-01-06 22:55:29,447 INFO L226 Difference]: Without dead ends: 510 [2021-01-06 22:55:29,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:55:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-01-06 22:55:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 354. [2021-01-06 22:55:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2021-01-06 22:55:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1028 transitions. [2021-01-06 22:55:29,455 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1028 transitions. Word has length 15 [2021-01-06 22:55:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:29,456 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 1028 transitions. [2021-01-06 22:55:29,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:55:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1028 transitions. [2021-01-06 22:55:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:29,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:29,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:29,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:29,663 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1203089891, now seen corresponding path program 146 times [2021-01-06 22:55:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:29,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738635327] [2021-01-06 22:55:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:29,842 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 22:55:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738635327] [2021-01-06 22:55:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036213060] [2021-01-06 22:55:29,843 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:29,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:29,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:30,316 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 22:55:30,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:30,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:30,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776478214] [2021-01-06 22:55:30,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:30,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:30,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:30,318 INFO L87 Difference]: Start difference. First operand 354 states and 1028 transitions. Second operand 19 states. [2021-01-06 22:55:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:31,156 INFO L93 Difference]: Finished difference Result 491 states and 1324 transitions. [2021-01-06 22:55:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:31,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:31,159 INFO L225 Difference]: With dead ends: 491 [2021-01-06 22:55:31,159 INFO L226 Difference]: Without dead ends: 486 [2021-01-06 22:55:31,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-01-06 22:55:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 360. [2021-01-06 22:55:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2021-01-06 22:55:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1040 transitions. [2021-01-06 22:55:31,166 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1040 transitions. Word has length 15 [2021-01-06 22:55:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:31,166 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 1040 transitions. [2021-01-06 22:55:31,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1040 transitions. [2021-01-06 22:55:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:31,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:31,167 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:31,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:31,368 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1425924223, now seen corresponding path program 147 times [2021-01-06 22:55:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:31,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943038843] [2021-01-06 22:55:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:31,554 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 22:55:31,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943038843] [2021-01-06 22:55:31,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301853282] [2021-01-06 22:55:31,554 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:31,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:32,010 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 22:55:32,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:32,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324827004] [2021-01-06 22:55:32,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:32,011 INFO L87 Difference]: Start difference. First operand 360 states and 1040 transitions. Second operand 19 states. [2021-01-06 22:55:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:32,818 INFO L93 Difference]: Finished difference Result 488 states and 1318 transitions. [2021-01-06 22:55:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:55:32,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:32,821 INFO L225 Difference]: With dead ends: 488 [2021-01-06 22:55:32,821 INFO L226 Difference]: Without dead ends: 483 [2021-01-06 22:55:32,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-01-06 22:55:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 360. [2021-01-06 22:55:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2021-01-06 22:55:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1039 transitions. [2021-01-06 22:55:32,828 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1039 transitions. Word has length 15 [2021-01-06 22:55:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:32,828 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 1039 transitions. [2021-01-06 22:55:32,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1039 transitions. [2021-01-06 22:55:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:32,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:32,829 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:33,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:33,044 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1405368433, now seen corresponding path program 148 times [2021-01-06 22:55:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:33,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095403565] [2021-01-06 22:55:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:33,222 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 22:55:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095403565] [2021-01-06 22:55:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335520100] [2021-01-06 22:55:33,222 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:33,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:33,660 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 22:55:33,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:33,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:33,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089128005] [2021-01-06 22:55:33,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:33,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:33,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:33,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:33,661 INFO L87 Difference]: Start difference. First operand 360 states and 1039 transitions. Second operand 19 states. [2021-01-06 22:55:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:34,814 INFO L93 Difference]: Finished difference Result 504 states and 1354 transitions. [2021-01-06 22:55:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:55:34,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:34,817 INFO L225 Difference]: With dead ends: 504 [2021-01-06 22:55:34,817 INFO L226 Difference]: Without dead ends: 499 [2021-01-06 22:55:34,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=350, Invalid=910, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:55:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-01-06 22:55:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 362. [2021-01-06 22:55:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-01-06 22:55:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1046 transitions. [2021-01-06 22:55:34,824 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1046 transitions. Word has length 15 [2021-01-06 22:55:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:34,824 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 1046 transitions. [2021-01-06 22:55:34,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1046 transitions. [2021-01-06 22:55:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:34,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:34,825 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:35,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-01-06 22:55:35,026 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1404763003, now seen corresponding path program 149 times [2021-01-06 22:55:35,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:35,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572079779] [2021-01-06 22:55:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:35,208 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 22:55:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572079779] [2021-01-06 22:55:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824064925] [2021-01-06 22:55:35,209 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:35,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:35,770 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 22:55:35,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:35,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:35,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927510067] [2021-01-06 22:55:35,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:35,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:35,772 INFO L87 Difference]: Start difference. First operand 362 states and 1046 transitions. Second operand 19 states. [2021-01-06 22:55:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:36,865 INFO L93 Difference]: Finished difference Result 495 states and 1329 transitions. [2021-01-06 22:55:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:55:36,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:36,868 INFO L225 Difference]: With dead ends: 495 [2021-01-06 22:55:36,868 INFO L226 Difference]: Without dead ends: 490 [2021-01-06 22:55:36,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:55:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-01-06 22:55:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-01-06 22:55:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2021-01-06 22:55:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1060 transitions. [2021-01-06 22:55:36,874 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1060 transitions. Word has length 15 [2021-01-06 22:55:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:36,874 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 1060 transitions. [2021-01-06 22:55:36,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1060 transitions. [2021-01-06 22:55:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:36,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:36,874 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:37,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:37,075 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1404743535, now seen corresponding path program 150 times [2021-01-06 22:55:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:37,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004921879] [2021-01-06 22:55:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:37,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004921879] [2021-01-06 22:55:37,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523016670] [2021-01-06 22:55:37,256 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:37,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:55:37,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:37,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:37,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:55:37,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:37,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:37,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:55:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176870132] [2021-01-06 22:55:37,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:55:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:55:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:55:37,700 INFO L87 Difference]: Start difference. First operand 366 states and 1060 transitions. Second operand 20 states. [2021-01-06 22:55:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:39,648 INFO L93 Difference]: Finished difference Result 604 states and 1598 transitions. [2021-01-06 22:55:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 22:55:39,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:55:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:39,651 INFO L225 Difference]: With dead ends: 604 [2021-01-06 22:55:39,651 INFO L226 Difference]: Without dead ends: 585 [2021-01-06 22:55:39,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=660, Invalid=1596, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:55:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-01-06 22:55:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 365. [2021-01-06 22:55:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2021-01-06 22:55:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1070 transitions. [2021-01-06 22:55:39,658 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1070 transitions. Word has length 15 [2021-01-06 22:55:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:39,658 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 1070 transitions. [2021-01-06 22:55:39,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:55:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1070 transitions. [2021-01-06 22:55:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:39,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:39,658 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:39,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-01-06 22:55:39,859 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1525687601, now seen corresponding path program 151 times [2021-01-06 22:55:39,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:39,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824122954] [2021-01-06 22:55:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:40,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824122954] [2021-01-06 22:55:40,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021149057] [2021-01-06 22:55:40,068 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:40,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:40,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120517485] [2021-01-06 22:55:40,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:40,517 INFO L87 Difference]: Start difference. First operand 365 states and 1070 transitions. Second operand 19 states. [2021-01-06 22:55:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:41,397 INFO L93 Difference]: Finished difference Result 484 states and 1321 transitions. [2021-01-06 22:55:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:41,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:41,399 INFO L225 Difference]: With dead ends: 484 [2021-01-06 22:55:41,400 INFO L226 Difference]: Without dead ends: 481 [2021-01-06 22:55:41,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:55:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-01-06 22:55:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 367. [2021-01-06 22:55:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-01-06 22:55:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1076 transitions. [2021-01-06 22:55:41,406 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1076 transitions. Word has length 15 [2021-01-06 22:55:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:41,406 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 1076 transitions. [2021-01-06 22:55:41,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1076 transitions. [2021-01-06 22:55:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:41,406 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:41,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:41,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-01-06 22:55:41,607 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1525685679, now seen corresponding path program 152 times [2021-01-06 22:55:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:41,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086097932] [2021-01-06 22:55:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:41,831 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 22:55:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086097932] [2021-01-06 22:55:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494339219] [2021-01-06 22:55:41,831 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:41,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:41,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:42,369 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 22:55:42,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:42,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643690888] [2021-01-06 22:55:42,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:42,371 INFO L87 Difference]: Start difference. First operand 367 states and 1076 transitions. Second operand 19 states. [2021-01-06 22:55:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:43,305 INFO L93 Difference]: Finished difference Result 513 states and 1389 transitions. [2021-01-06 22:55:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:43,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:43,308 INFO L225 Difference]: With dead ends: 513 [2021-01-06 22:55:43,308 INFO L226 Difference]: Without dead ends: 508 [2021-01-06 22:55:43,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:55:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-01-06 22:55:43,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 367. [2021-01-06 22:55:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-01-06 22:55:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1076 transitions. [2021-01-06 22:55:43,319 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1076 transitions. Word has length 15 [2021-01-06 22:55:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:43,319 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 1076 transitions. [2021-01-06 22:55:43,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1076 transitions. [2021-01-06 22:55:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:43,320 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:43,320 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:43,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:43,535 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1525628019, now seen corresponding path program 153 times [2021-01-06 22:55:43,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:43,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800950194] [2021-01-06 22:55:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:43,775 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 22:55:43,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800950194] [2021-01-06 22:55:43,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822940492] [2021-01-06 22:55:43,775 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:43,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:44,313 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 22:55:44,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:44,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798653051] [2021-01-06 22:55:44,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:44,315 INFO L87 Difference]: Start difference. First operand 367 states and 1076 transitions. Second operand 19 states. [2021-01-06 22:55:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:45,174 INFO L93 Difference]: Finished difference Result 518 states and 1401 transitions. [2021-01-06 22:55:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:45,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:45,177 INFO L225 Difference]: With dead ends: 518 [2021-01-06 22:55:45,177 INFO L226 Difference]: Without dead ends: 513 [2021-01-06 22:55:45,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-01-06 22:55:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 369. [2021-01-06 22:55:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2021-01-06 22:55:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1082 transitions. [2021-01-06 22:55:45,184 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1082 transitions. Word has length 15 [2021-01-06 22:55:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:45,184 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 1082 transitions. [2021-01-06 22:55:45,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1082 transitions. [2021-01-06 22:55:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:45,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:45,184 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:45,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-01-06 22:55:45,385 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1523779055, now seen corresponding path program 154 times [2021-01-06 22:55:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:45,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115482211] [2021-01-06 22:55:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:45,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115482211] [2021-01-06 22:55:45,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708652544] [2021-01-06 22:55:45,589 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:45,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:45,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:45,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:45,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:45,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841340033] [2021-01-06 22:55:45,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:45,991 INFO L87 Difference]: Start difference. First operand 369 states and 1082 transitions. Second operand 19 states. [2021-01-06 22:55:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:46,696 INFO L93 Difference]: Finished difference Result 499 states and 1360 transitions. [2021-01-06 22:55:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:55:46,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:46,699 INFO L225 Difference]: With dead ends: 499 [2021-01-06 22:55:46,699 INFO L226 Difference]: Without dead ends: 493 [2021-01-06 22:55:46,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:55:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-01-06 22:55:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 375. [2021-01-06 22:55:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2021-01-06 22:55:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1090 transitions. [2021-01-06 22:55:46,705 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1090 transitions. Word has length 15 [2021-01-06 22:55:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:46,705 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 1090 transitions. [2021-01-06 22:55:46,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1090 transitions. [2021-01-06 22:55:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:46,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:46,706 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:46,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:46,907 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 156382699, now seen corresponding path program 155 times [2021-01-06 22:55:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:46,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965303712] [2021-01-06 22:55:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965303712] [2021-01-06 22:55:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022797030] [2021-01-06 22:55:47,110 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:47,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:47,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:47,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:47,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:47,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:47,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343943123] [2021-01-06 22:55:47,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:47,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:47,604 INFO L87 Difference]: Start difference. First operand 375 states and 1090 transitions. Second operand 19 states. [2021-01-06 22:55:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:48,571 INFO L93 Difference]: Finished difference Result 500 states and 1353 transitions. [2021-01-06 22:55:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:55:48,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:48,574 INFO L225 Difference]: With dead ends: 500 [2021-01-06 22:55:48,574 INFO L226 Difference]: Without dead ends: 497 [2021-01-06 22:55:48,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:55:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-01-06 22:55:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 376. [2021-01-06 22:55:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2021-01-06 22:55:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1093 transitions. [2021-01-06 22:55:48,581 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1093 transitions. Word has length 15 [2021-01-06 22:55:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:48,581 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 1093 transitions. [2021-01-06 22:55:48,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1093 transitions. [2021-01-06 22:55:48,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:48,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:48,582 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:48,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-01-06 22:55:48,782 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:48,783 INFO L82 PathProgramCache]: Analyzing trace with hash 156384621, now seen corresponding path program 156 times [2021-01-06 22:55:48,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:48,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961466338] [2021-01-06 22:55:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:48,972 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 22:55:48,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961466338] [2021-01-06 22:55:48,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602829044] [2021-01-06 22:55:48,973 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:49,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:55:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:49,458 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 22:55:49,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:49,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:49,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184171366] [2021-01-06 22:55:49,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:49,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:49,460 INFO L87 Difference]: Start difference. First operand 376 states and 1093 transitions. Second operand 19 states. [2021-01-06 22:55:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:50,386 INFO L93 Difference]: Finished difference Result 527 states and 1421 transitions. [2021-01-06 22:55:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:55:50,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:50,389 INFO L225 Difference]: With dead ends: 527 [2021-01-06 22:55:50,389 INFO L226 Difference]: Without dead ends: 522 [2021-01-06 22:55:50,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-01-06 22:55:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 376. [2021-01-06 22:55:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2021-01-06 22:55:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1093 transitions. [2021-01-06 22:55:50,396 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1093 transitions. Word has length 15 [2021-01-06 22:55:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:50,396 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 1093 transitions. [2021-01-06 22:55:50,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1093 transitions. [2021-01-06 22:55:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:50,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:50,397 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:50,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:50,597 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 156442281, now seen corresponding path program 157 times [2021-01-06 22:55:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:50,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222622265] [2021-01-06 22:55:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:50,785 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 22:55:50,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222622265] [2021-01-06 22:55:50,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531790420] [2021-01-06 22:55:50,786 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:50,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:51,336 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 22:55:51,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:51,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562534362] [2021-01-06 22:55:51,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:51,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:51,337 INFO L87 Difference]: Start difference. First operand 376 states and 1093 transitions. Second operand 19 states. [2021-01-06 22:55:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:52,254 INFO L93 Difference]: Finished difference Result 527 states and 1421 transitions. [2021-01-06 22:55:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:55:52,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:52,256 INFO L225 Difference]: With dead ends: 527 [2021-01-06 22:55:52,256 INFO L226 Difference]: Without dead ends: 522 [2021-01-06 22:55:52,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:55:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-01-06 22:55:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 377. [2021-01-06 22:55:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2021-01-06 22:55:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1096 transitions. [2021-01-06 22:55:52,263 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1096 transitions. Word has length 15 [2021-01-06 22:55:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:52,263 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 1096 transitions. [2021-01-06 22:55:52,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1096 transitions. [2021-01-06 22:55:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:52,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:52,263 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:52,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:52,464 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash 158291245, now seen corresponding path program 158 times [2021-01-06 22:55:52,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:52,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809598823] [2021-01-06 22:55:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809598823] [2021-01-06 22:55:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333952531] [2021-01-06 22:55:52,654 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:52,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:55:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:53,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:53,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450942399] [2021-01-06 22:55:53,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:53,108 INFO L87 Difference]: Start difference. First operand 377 states and 1096 transitions. Second operand 19 states. [2021-01-06 22:55:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:53,877 INFO L93 Difference]: Finished difference Result 499 states and 1358 transitions. [2021-01-06 22:55:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:55:53,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:53,880 INFO L225 Difference]: With dead ends: 499 [2021-01-06 22:55:53,880 INFO L226 Difference]: Without dead ends: 493 [2021-01-06 22:55:53,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:55:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-01-06 22:55:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 375. [2021-01-06 22:55:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2021-01-06 22:55:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1089 transitions. [2021-01-06 22:55:53,886 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1089 transitions. Word has length 15 [2021-01-06 22:55:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:53,886 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 1089 transitions. [2021-01-06 22:55:53,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1089 transitions. [2021-01-06 22:55:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:53,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:53,887 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:54,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:54,088 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash 738200929, now seen corresponding path program 159 times [2021-01-06 22:55:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:54,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875441525] [2021-01-06 22:55:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:54,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875441525] [2021-01-06 22:55:54,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117276092] [2021-01-06 22:55:54,295 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:54,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:55:54,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:54,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:54,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652493313] [2021-01-06 22:55:54,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:54,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:54,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:54,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:54,839 INFO L87 Difference]: Start difference. First operand 375 states and 1089 transitions. Second operand 19 states. [2021-01-06 22:55:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:56,241 INFO L93 Difference]: Finished difference Result 504 states and 1357 transitions. [2021-01-06 22:55:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:55:56,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:56,246 INFO L225 Difference]: With dead ends: 504 [2021-01-06 22:55:56,246 INFO L226 Difference]: Without dead ends: 501 [2021-01-06 22:55:56,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:55:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-01-06 22:55:56,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 375. [2021-01-06 22:55:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2021-01-06 22:55:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1089 transitions. [2021-01-06 22:55:56,252 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1089 transitions. Word has length 15 [2021-01-06 22:55:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:56,253 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 1089 transitions. [2021-01-06 22:55:56,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1089 transitions. [2021-01-06 22:55:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:56,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:56,253 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:56,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:56,454 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 738202851, now seen corresponding path program 160 times [2021-01-06 22:55:56,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:56,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902455125] [2021-01-06 22:55:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:56,655 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 22:55:56,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902455125] [2021-01-06 22:55:56,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058652125] [2021-01-06 22:55:56,656 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:56,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:56,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:57,128 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 22:55:57,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159953889] [2021-01-06 22:55:57,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:57,130 INFO L87 Difference]: Start difference. First operand 375 states and 1089 transitions. Second operand 19 states. [2021-01-06 22:55:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:58,378 INFO L93 Difference]: Finished difference Result 522 states and 1406 transitions. [2021-01-06 22:55:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:55:58,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:55:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:58,382 INFO L225 Difference]: With dead ends: 522 [2021-01-06 22:55:58,382 INFO L226 Difference]: Without dead ends: 517 [2021-01-06 22:55:58,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:55:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-01-06 22:55:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 376. [2021-01-06 22:55:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2021-01-06 22:55:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1091 transitions. [2021-01-06 22:55:58,389 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1091 transitions. Word has length 15 [2021-01-06 22:55:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:58,389 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 1091 transitions. [2021-01-06 22:55:58,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:55:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1091 transitions. [2021-01-06 22:55:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:55:58,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:58,389 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:58,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-01-06 22:55:58,590 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash 738260511, now seen corresponding path program 161 times [2021-01-06 22:55:58,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:58,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731678675] [2021-01-06 22:55:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:58,772 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 22:55:58,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731678675] [2021-01-06 22:55:58,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634312109] [2021-01-06 22:55:58,773 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:58,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:58,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:55:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:59,286 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 22:55:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:59,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:55:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614425890] [2021-01-06 22:55:59,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:55:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:55:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:55:59,288 INFO L87 Difference]: Start difference. First operand 376 states and 1091 transitions. Second operand 19 states. [2021-01-06 22:56:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:00,459 INFO L93 Difference]: Finished difference Result 533 states and 1425 transitions. [2021-01-06 22:56:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:56:00,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:00,462 INFO L225 Difference]: With dead ends: 533 [2021-01-06 22:56:00,463 INFO L226 Difference]: Without dead ends: 528 [2021-01-06 22:56:00,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-01-06 22:56:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 376. [2021-01-06 22:56:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2021-01-06 22:56:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1091 transitions. [2021-01-06 22:56:00,469 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1091 transitions. Word has length 15 [2021-01-06 22:56:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:00,469 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 1091 transitions. [2021-01-06 22:56:00,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1091 transitions. [2021-01-06 22:56:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:00,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:00,470 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:00,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-01-06 22:56:00,671 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:00,671 INFO L82 PathProgramCache]: Analyzing trace with hash 756969259, now seen corresponding path program 162 times [2021-01-06 22:56:00,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:00,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453331193] [2021-01-06 22:56:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:00,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453331193] [2021-01-06 22:56:00,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930958804] [2021-01-06 22:56:00,876 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:00,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246348575] [2021-01-06 22:56:01,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:01,413 INFO L87 Difference]: Start difference. First operand 376 states and 1091 transitions. Second operand 19 states. [2021-01-06 22:56:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:03,054 INFO L93 Difference]: Finished difference Result 507 states and 1357 transitions. [2021-01-06 22:56:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:56:03,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:03,057 INFO L225 Difference]: With dead ends: 507 [2021-01-06 22:56:03,057 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 22:56:03,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:56:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 22:56:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 377. [2021-01-06 22:56:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2021-01-06 22:56:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1096 transitions. [2021-01-06 22:56:03,064 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1096 transitions. Word has length 15 [2021-01-06 22:56:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:03,064 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 1096 transitions. [2021-01-06 22:56:03,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1096 transitions. [2021-01-06 22:56:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:03,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:03,065 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:03,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-01-06 22:56:03,267 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash 756971181, now seen corresponding path program 163 times [2021-01-06 22:56:03,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:03,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919994586] [2021-01-06 22:56:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:03,523 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 22:56:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919994586] [2021-01-06 22:56:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337492785] [2021-01-06 22:56:03,524 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:04,125 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 22:56:04,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:04,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:04,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665550648] [2021-01-06 22:56:04,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:04,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:04,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:04,127 INFO L87 Difference]: Start difference. First operand 377 states and 1096 transitions. Second operand 19 states. [2021-01-06 22:56:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:05,586 INFO L93 Difference]: Finished difference Result 536 states and 1430 transitions. [2021-01-06 22:56:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:56:05,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:05,589 INFO L225 Difference]: With dead ends: 536 [2021-01-06 22:56:05,589 INFO L226 Difference]: Without dead ends: 531 [2021-01-06 22:56:05,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:56:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-01-06 22:56:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 380. [2021-01-06 22:56:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2021-01-06 22:56:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-01-06 22:56:05,599 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 15 [2021-01-06 22:56:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:05,599 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-01-06 22:56:05,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-01-06 22:56:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:05,600 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:05,600 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:05,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:05,804 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:05,805 INFO L82 PathProgramCache]: Analyzing trace with hash 757574689, now seen corresponding path program 164 times [2021-01-06 22:56:05,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:05,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600617735] [2021-01-06 22:56:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:06,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600617735] [2021-01-06 22:56:06,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091701902] [2021-01-06 22:56:06,055 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:06,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:56:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:06,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:06,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798059601] [2021-01-06 22:56:06,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:06,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:06,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:06,594 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand 19 states. [2021-01-06 22:56:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:08,284 INFO L93 Difference]: Finished difference Result 486 states and 1318 transitions. [2021-01-06 22:56:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:56:08,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:08,288 INFO L225 Difference]: With dead ends: 486 [2021-01-06 22:56:08,288 INFO L226 Difference]: Without dead ends: 483 [2021-01-06 22:56:08,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:56:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-01-06 22:56:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 382. [2021-01-06 22:56:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-01-06 22:56:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1112 transitions. [2021-01-06 22:56:08,294 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1112 transitions. Word has length 15 [2021-01-06 22:56:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:08,294 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 1112 transitions. [2021-01-06 22:56:08,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1112 transitions. [2021-01-06 22:56:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:08,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:08,295 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:08,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:08,497 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash 757594157, now seen corresponding path program 165 times [2021-01-06 22:56:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:08,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809149712] [2021-01-06 22:56:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:08,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809149712] [2021-01-06 22:56:08,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350407588] [2021-01-06 22:56:08,749 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:08,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:56:08,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:09,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:09,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:09,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:09,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:09,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820397600] [2021-01-06 22:56:09,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:09,262 INFO L87 Difference]: Start difference. First operand 382 states and 1112 transitions. Second operand 20 states. [2021-01-06 22:56:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:11,341 INFO L93 Difference]: Finished difference Result 532 states and 1424 transitions. [2021-01-06 22:56:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 22:56:11,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:11,344 INFO L225 Difference]: With dead ends: 532 [2021-01-06 22:56:11,344 INFO L226 Difference]: Without dead ends: 517 [2021-01-06 22:56:11,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=688, Invalid=1568, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:56:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-01-06 22:56:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 380. [2021-01-06 22:56:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2021-01-06 22:56:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1102 transitions. [2021-01-06 22:56:11,350 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1102 transitions. Word has length 15 [2021-01-06 22:56:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:11,350 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 1102 transitions. [2021-01-06 22:56:11,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1102 transitions. [2021-01-06 22:56:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:11,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:11,351 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:11,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-01-06 22:56:11,556 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash 757634271, now seen corresponding path program 166 times [2021-01-06 22:56:11,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:11,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622115067] [2021-01-06 22:56:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:11,771 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 22:56:11,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622115067] [2021-01-06 22:56:11,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337511202] [2021-01-06 22:56:11,771 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:11,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:11,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:11,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:12,354 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 22:56:12,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:12,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198056534] [2021-01-06 22:56:12,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:12,356 INFO L87 Difference]: Start difference. First operand 380 states and 1102 transitions. Second operand 19 states. [2021-01-06 22:56:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:13,981 INFO L93 Difference]: Finished difference Result 538 states and 1449 transitions. [2021-01-06 22:56:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:56:13,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:13,985 INFO L225 Difference]: With dead ends: 538 [2021-01-06 22:56:13,985 INFO L226 Difference]: Without dead ends: 533 [2021-01-06 22:56:13,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:56:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-01-06 22:56:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 384. [2021-01-06 22:56:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2021-01-06 22:56:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1116 transitions. [2021-01-06 22:56:13,991 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1116 transitions. Word has length 15 [2021-01-06 22:56:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:13,991 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 1116 transitions. [2021-01-06 22:56:13,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1116 transitions. [2021-01-06 22:56:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:13,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:13,992 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:14,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:14,193 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 757653739, now seen corresponding path program 167 times [2021-01-06 22:56:14,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127844144] [2021-01-06 22:56:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:14,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127844144] [2021-01-06 22:56:14,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926789826] [2021-01-06 22:56:14,428 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:14,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:56:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:14,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:14,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:14,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:14,947 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:14,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:14,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:15,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:15,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:15,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594103356] [2021-01-06 22:56:15,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:15,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:15,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:15,014 INFO L87 Difference]: Start difference. First operand 384 states and 1116 transitions. Second operand 20 states. [2021-01-06 22:56:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:17,469 INFO L93 Difference]: Finished difference Result 624 states and 1634 transitions. [2021-01-06 22:56:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:56:17,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:17,473 INFO L225 Difference]: With dead ends: 624 [2021-01-06 22:56:17,473 INFO L226 Difference]: Without dead ends: 608 [2021-01-06 22:56:17,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:56:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-01-06 22:56:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 382. [2021-01-06 22:56:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-01-06 22:56:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1110 transitions. [2021-01-06 22:56:17,480 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1110 transitions. Word has length 15 [2021-01-06 22:56:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:17,480 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 1110 transitions. [2021-01-06 22:56:17,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1110 transitions. [2021-01-06 22:56:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:17,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:17,480 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:17,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:17,681 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash 759500781, now seen corresponding path program 168 times [2021-01-06 22:56:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545095857] [2021-01-06 22:56:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:17,978 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 22:56:17,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545095857] [2021-01-06 22:56:17,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919776146] [2021-01-06 22:56:17,979 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:18,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:18,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:18,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:18,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:18,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:18,753 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 22:56:18,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:18,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:18,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349252924] [2021-01-06 22:56:18,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:18,755 INFO L87 Difference]: Start difference. First operand 382 states and 1110 transitions. Second operand 20 states. [2021-01-06 22:56:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:21,527 INFO L93 Difference]: Finished difference Result 714 states and 1890 transitions. [2021-01-06 22:56:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 22:56:21,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:21,531 INFO L225 Difference]: With dead ends: 714 [2021-01-06 22:56:21,531 INFO L226 Difference]: Without dead ends: 696 [2021-01-06 22:56:21,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=663, Invalid=1689, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:56:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-01-06 22:56:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 386. [2021-01-06 22:56:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2021-01-06 22:56:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1136 transitions. [2021-01-06 22:56:21,539 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1136 transitions. Word has length 15 [2021-01-06 22:56:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:21,539 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 1136 transitions. [2021-01-06 22:56:21,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1136 transitions. [2021-01-06 22:56:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:21,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:21,539 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:21,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:21,740 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1360534241, now seen corresponding path program 169 times [2021-01-06 22:56:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:21,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929231022] [2021-01-06 22:56:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:21,991 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 22:56:21,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929231022] [2021-01-06 22:56:21,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300314835] [2021-01-06 22:56:21,992 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:22,470 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 22:56:22,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:22,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118046112] [2021-01-06 22:56:22,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:22,472 INFO L87 Difference]: Start difference. First operand 386 states and 1136 transitions. Second operand 19 states. [2021-01-06 22:56:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:23,611 INFO L93 Difference]: Finished difference Result 524 states and 1434 transitions. [2021-01-06 22:56:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:56:23,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:23,615 INFO L225 Difference]: With dead ends: 524 [2021-01-06 22:56:23,615 INFO L226 Difference]: Without dead ends: 520 [2021-01-06 22:56:23,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-01-06 22:56:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 389. [2021-01-06 22:56:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2021-01-06 22:56:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1144 transitions. [2021-01-06 22:56:23,622 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1144 transitions. Word has length 15 [2021-01-06 22:56:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:23,623 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 1144 transitions. [2021-01-06 22:56:23,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1144 transitions. [2021-01-06 22:56:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:23,623 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:23,623 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:23,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:23,824 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1362379361, now seen corresponding path program 170 times [2021-01-06 22:56:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:23,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19242958] [2021-01-06 22:56:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:24,107 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 22:56:24,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19242958] [2021-01-06 22:56:24,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696424528] [2021-01-06 22:56:24,108 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:24,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:24,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:24,610 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 22:56:24,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:24,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387417014] [2021-01-06 22:56:24,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:24,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:24,612 INFO L87 Difference]: Start difference. First operand 389 states and 1144 transitions. Second operand 19 states. [2021-01-06 22:56:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:25,773 INFO L93 Difference]: Finished difference Result 548 states and 1491 transitions. [2021-01-06 22:56:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:56:25,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:25,778 INFO L225 Difference]: With dead ends: 548 [2021-01-06 22:56:25,778 INFO L226 Difference]: Without dead ends: 543 [2021-01-06 22:56:25,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-01-06 22:56:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 394. [2021-01-06 22:56:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2021-01-06 22:56:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1157 transitions. [2021-01-06 22:56:25,787 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1157 transitions. Word has length 15 [2021-01-06 22:56:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:25,787 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 1157 transitions. [2021-01-06 22:56:25,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1157 transitions. [2021-01-06 22:56:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:25,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:25,788 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:25,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:25,990 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1362381283, now seen corresponding path program 171 times [2021-01-06 22:56:25,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:25,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453630872] [2021-01-06 22:56:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:26,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453630872] [2021-01-06 22:56:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582210944] [2021-01-06 22:56:26,215 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:26,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:56:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:26,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:26,667 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 22:56:26,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:26,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543565468] [2021-01-06 22:56:26,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:26,669 INFO L87 Difference]: Start difference. First operand 394 states and 1157 transitions. Second operand 19 states. [2021-01-06 22:56:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:27,594 INFO L93 Difference]: Finished difference Result 557 states and 1515 transitions. [2021-01-06 22:56:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:56:27,596 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:27,598 INFO L225 Difference]: With dead ends: 557 [2021-01-06 22:56:27,598 INFO L226 Difference]: Without dead ends: 551 [2021-01-06 22:56:27,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:56:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-01-06 22:56:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 392. [2021-01-06 22:56:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-01-06 22:56:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1151 transitions. [2021-01-06 22:56:27,607 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1151 transitions. Word has length 15 [2021-01-06 22:56:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:27,607 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 1151 transitions. [2021-01-06 22:56:27,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1151 transitions. [2021-01-06 22:56:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:27,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:27,608 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:27,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-01-06 22:56:27,809 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:27,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1417850203, now seen corresponding path program 172 times [2021-01-06 22:56:27,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:27,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282907251] [2021-01-06 22:56:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:28,071 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 22:56:28,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282907251] [2021-01-06 22:56:28,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718117349] [2021-01-06 22:56:28,071 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:28,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:28,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:28,650 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 22:56:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:28,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:28,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691214372] [2021-01-06 22:56:28,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:28,652 INFO L87 Difference]: Start difference. First operand 392 states and 1151 transitions. Second operand 19 states. [2021-01-06 22:56:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:30,044 INFO L93 Difference]: Finished difference Result 557 states and 1521 transitions. [2021-01-06 22:56:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:56:30,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:30,048 INFO L225 Difference]: With dead ends: 557 [2021-01-06 22:56:30,048 INFO L226 Difference]: Without dead ends: 551 [2021-01-06 22:56:30,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-01-06 22:56:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 392. [2021-01-06 22:56:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-01-06 22:56:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1150 transitions. [2021-01-06 22:56:30,055 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1150 transitions. Word has length 15 [2021-01-06 22:56:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:30,055 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 1150 transitions. [2021-01-06 22:56:30,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1150 transitions. [2021-01-06 22:56:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:30,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:30,056 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:30,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-01-06 22:56:30,257 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1965105989, now seen corresponding path program 173 times [2021-01-06 22:56:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:30,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983247150] [2021-01-06 22:56:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:30,481 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 22:56:30,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983247150] [2021-01-06 22:56:30,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434731817] [2021-01-06 22:56:30,482 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:30,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:56:30,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:30,963 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 22:56:30,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:30,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348889801] [2021-01-06 22:56:30,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:30,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:30,965 INFO L87 Difference]: Start difference. First operand 392 states and 1150 transitions. Second operand 19 states. [2021-01-06 22:56:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:32,071 INFO L93 Difference]: Finished difference Result 546 states and 1484 transitions. [2021-01-06 22:56:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:56:32,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:32,074 INFO L225 Difference]: With dead ends: 546 [2021-01-06 22:56:32,075 INFO L226 Difference]: Without dead ends: 542 [2021-01-06 22:56:32,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:56:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-01-06 22:56:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 393. [2021-01-06 22:56:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-01-06 22:56:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1153 transitions. [2021-01-06 22:56:32,081 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1153 transitions. Word has length 15 [2021-01-06 22:56:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:32,082 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 1153 transitions. [2021-01-06 22:56:32,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1153 transitions. [2021-01-06 22:56:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:32,082 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:32,082 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:32,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-01-06 22:56:32,283 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:32,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1966951109, now seen corresponding path program 174 times [2021-01-06 22:56:32,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:32,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727442417] [2021-01-06 22:56:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:32,501 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 22:56:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727442417] [2021-01-06 22:56:32,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079689425] [2021-01-06 22:56:32,502 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:32,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:32,959 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 22:56:32,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:32,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134207832] [2021-01-06 22:56:32,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:32,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:32,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:32,961 INFO L87 Difference]: Start difference. First operand 393 states and 1153 transitions. Second operand 19 states. [2021-01-06 22:56:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:34,027 INFO L93 Difference]: Finished difference Result 567 states and 1538 transitions. [2021-01-06 22:56:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:56:34,030 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:34,031 INFO L225 Difference]: With dead ends: 567 [2021-01-06 22:56:34,031 INFO L226 Difference]: Without dead ends: 562 [2021-01-06 22:56:34,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:56:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-01-06 22:56:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 398. [2021-01-06 22:56:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2021-01-06 22:56:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1166 transitions. [2021-01-06 22:56:34,038 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1166 transitions. Word has length 15 [2021-01-06 22:56:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:34,038 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 1166 transitions. [2021-01-06 22:56:34,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1166 transitions. [2021-01-06 22:56:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:34,046 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:34,046 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:34,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-01-06 22:56:34,247 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:34,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1966953031, now seen corresponding path program 175 times [2021-01-06 22:56:34,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:34,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301827153] [2021-01-06 22:56:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:34,487 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 22:56:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301827153] [2021-01-06 22:56:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365233900] [2021-01-06 22:56:34,487 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:34,937 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 22:56:34,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:34,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:34,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283664564] [2021-01-06 22:56:34,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:34,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:34,938 INFO L87 Difference]: Start difference. First operand 398 states and 1166 transitions. Second operand 19 states. [2021-01-06 22:56:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:35,991 INFO L93 Difference]: Finished difference Result 573 states and 1556 transitions. [2021-01-06 22:56:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:56:35,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:35,995 INFO L225 Difference]: With dead ends: 573 [2021-01-06 22:56:35,995 INFO L226 Difference]: Without dead ends: 567 [2021-01-06 22:56:35,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:56:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-01-06 22:56:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 395. [2021-01-06 22:56:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2021-01-06 22:56:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1157 transitions. [2021-01-06 22:56:36,002 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1157 transitions. Word has length 15 [2021-01-06 22:56:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:36,003 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 1157 transitions. [2021-01-06 22:56:36,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1157 transitions. [2021-01-06 22:56:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:36,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:36,004 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:36,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-01-06 22:56:36,219 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2022421951, now seen corresponding path program 176 times [2021-01-06 22:56:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:36,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845516838] [2021-01-06 22:56:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:36,456 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 22:56:36,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845516838] [2021-01-06 22:56:36,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381477692] [2021-01-06 22:56:36,456 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:36,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:36,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:37,056 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 22:56:37,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139541461] [2021-01-06 22:56:37,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:37,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:37,058 INFO L87 Difference]: Start difference. First operand 395 states and 1157 transitions. Second operand 19 states. [2021-01-06 22:56:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:38,414 INFO L93 Difference]: Finished difference Result 568 states and 1547 transitions. [2021-01-06 22:56:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:56:38,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:38,418 INFO L225 Difference]: With dead ends: 568 [2021-01-06 22:56:38,418 INFO L226 Difference]: Without dead ends: 562 [2021-01-06 22:56:38,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:56:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-01-06 22:56:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 391. [2021-01-06 22:56:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 22:56:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1148 transitions. [2021-01-06 22:56:38,428 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1148 transitions. Word has length 15 [2021-01-06 22:56:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:38,428 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 1148 transitions. [2021-01-06 22:56:38,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1148 transitions. [2021-01-06 22:56:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:38,429 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:38,429 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:38,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:38,644 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1473365361, now seen corresponding path program 177 times [2021-01-06 22:56:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:38,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282757365] [2021-01-06 22:56:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:38,876 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 22:56:38,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282757365] [2021-01-06 22:56:38,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538032058] [2021-01-06 22:56:38,876 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:38,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:56:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:38,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:39,408 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 22:56:39,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:39,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:39,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954184756] [2021-01-06 22:56:39,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:39,410 INFO L87 Difference]: Start difference. First operand 391 states and 1148 transitions. Second operand 19 states. [2021-01-06 22:56:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:41,064 INFO L93 Difference]: Finished difference Result 547 states and 1486 transitions. [2021-01-06 22:56:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 22:56:41,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:41,068 INFO L225 Difference]: With dead ends: 547 [2021-01-06 22:56:41,068 INFO L226 Difference]: Without dead ends: 543 [2021-01-06 22:56:41,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=376, Invalid=1030, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:56:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-01-06 22:56:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 391. [2021-01-06 22:56:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 22:56:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1148 transitions. [2021-01-06 22:56:41,075 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1148 transitions. Word has length 15 [2021-01-06 22:56:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:41,075 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 1148 transitions. [2021-01-06 22:56:41,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1148 transitions. [2021-01-06 22:56:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:41,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:41,076 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:41,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-01-06 22:56:41,278 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1471520241, now seen corresponding path program 178 times [2021-01-06 22:56:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:41,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150528969] [2021-01-06 22:56:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:41,506 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 22:56:41,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150528969] [2021-01-06 22:56:41,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339294991] [2021-01-06 22:56:41,506 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:41,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:41,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:42,002 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 22:56:42,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:42,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076875614] [2021-01-06 22:56:42,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:42,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:42,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:42,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:42,004 INFO L87 Difference]: Start difference. First operand 391 states and 1148 transitions. Second operand 19 states. [2021-01-06 22:56:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:43,472 INFO L93 Difference]: Finished difference Result 570 states and 1539 transitions. [2021-01-06 22:56:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:56:43,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:43,476 INFO L225 Difference]: With dead ends: 570 [2021-01-06 22:56:43,476 INFO L226 Difference]: Without dead ends: 565 [2021-01-06 22:56:43,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:56:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-01-06 22:56:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 394. [2021-01-06 22:56:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2021-01-06 22:56:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1156 transitions. [2021-01-06 22:56:43,482 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1156 transitions. Word has length 15 [2021-01-06 22:56:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:43,482 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 1156 transitions. [2021-01-06 22:56:43,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1156 transitions. [2021-01-06 22:56:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:43,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:43,482 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:43,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-01-06 22:56:43,683 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1471518319, now seen corresponding path program 179 times [2021-01-06 22:56:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14661032] [2021-01-06 22:56:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:43,939 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 22:56:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14661032] [2021-01-06 22:56:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741309938] [2021-01-06 22:56:43,939 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:44,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:56:44,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:44,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:44,551 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 22:56:44,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:44,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258781035] [2021-01-06 22:56:44,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:44,553 INFO L87 Difference]: Start difference. First operand 394 states and 1156 transitions. Second operand 19 states. [2021-01-06 22:56:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:45,787 INFO L93 Difference]: Finished difference Result 579 states and 1563 transitions. [2021-01-06 22:56:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:56:45,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:45,791 INFO L225 Difference]: With dead ends: 579 [2021-01-06 22:56:45,792 INFO L226 Difference]: Without dead ends: 573 [2021-01-06 22:56:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-01-06 22:56:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 392. [2021-01-06 22:56:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-01-06 22:56:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1149 transitions. [2021-01-06 22:56:45,799 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1149 transitions. Word has length 15 [2021-01-06 22:56:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:45,799 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 1149 transitions. [2021-01-06 22:56:45,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1149 transitions. [2021-01-06 22:56:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:45,800 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:45,800 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:46,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:46,001 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash -891547131, now seen corresponding path program 180 times [2021-01-06 22:56:46,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:46,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60744821] [2021-01-06 22:56:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:46,228 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 22:56:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60744821] [2021-01-06 22:56:46,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693247768] [2021-01-06 22:56:46,229 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:46,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:46,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:56:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:46,771 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 22:56:46,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:46,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:46,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619821995] [2021-01-06 22:56:46,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:46,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:46,772 INFO L87 Difference]: Start difference. First operand 392 states and 1149 transitions. Second operand 19 states. [2021-01-06 22:56:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:48,578 INFO L93 Difference]: Finished difference Result 541 states and 1468 transitions. [2021-01-06 22:56:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:56:48,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2021-01-06 22:56:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:48,582 INFO L225 Difference]: With dead ends: 541 [2021-01-06 22:56:48,582 INFO L226 Difference]: Without dead ends: 537 [2021-01-06 22:56:48,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:56:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-01-06 22:56:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 391. [2021-01-06 22:56:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 22:56:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1146 transitions. [2021-01-06 22:56:48,589 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1146 transitions. Word has length 15 [2021-01-06 22:56:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:48,589 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 1146 transitions. [2021-01-06 22:56:48,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1146 transitions. [2021-01-06 22:56:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:48,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:48,590 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:48,791 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -872778801, now seen corresponding path program 181 times [2021-01-06 22:56:48,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:48,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960581162] [2021-01-06 22:56:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:49,032 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 22:56:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960581162] [2021-01-06 22:56:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742195380] [2021-01-06 22:56:49,033 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:49,551 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 22:56:49,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:49,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:49,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415370089] [2021-01-06 22:56:49,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:49,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:49,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:49,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:49,553 INFO L87 Difference]: Start difference. First operand 391 states and 1146 transitions. Second operand 19 states.