/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_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:52:41,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:52:41,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:52:41,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 22:52:41,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 22:52:41,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 22:52:41,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 22:52:41,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 22:52:41,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 22:52:41,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 22:52:41,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 22:52:41,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 22:52:41,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:52:41,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:52:42,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:52:42,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:52:42,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:52:42,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:52:42,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:52:42,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:52:42,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:52:42,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:52:42,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:52:42,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:52:42,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 22:52:42,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 22:52:42,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 22:52:42,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 22:52:42,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 22:52:42,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 22:52:42,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 22:52:42,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 22:52:42,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 22:52:42,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:52:42,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:52:42,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:52:42,073 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 22:52:42,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:52:42,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:52:42,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:52:42,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:52:42,128 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:52:42,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:52:42,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:52:42,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:52:42,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:52:42,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:52:42,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:52:42,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:52:42,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:52:42,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:52:42,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:52:42,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:52:42,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:52:42,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:52:42,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:52:42,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:52:42,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:52:42,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:52:42,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:52:42,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:52:42,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:52:42,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:52:42,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:52:42,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:52:42,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:52:42,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:52:42,562 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:52:42,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longest-1.i [2021-01-06 22:52:42,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ed7151c/71beb55fbb384f95aa9d7734cc7e388f/FLAGac6ee4d3e [2021-01-06 22:52:43,393 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:52:43,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i [2021-01-06 22:52:43,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ed7151c/71beb55fbb384f95aa9d7734cc7e388f/FLAGac6ee4d3e [2021-01-06 22:52:43,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/13ed7151c/71beb55fbb384f95aa9d7734cc7e388f [2021-01-06 22:52:43,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:52:43,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:52:43,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:52:43,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:52:43,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:52:43,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:52:43" (1/1) ... [2021-01-06 22:52:43,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71400ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:43, skipping insertion in model container [2021-01-06 22:52:43,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:52:43" (1/1) ... [2021-01-06 22:52:43,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:52:43,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 22:52:44,075 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_longest-1.i[30286,30299] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2021-01-06 22:52:44,096 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_longest-1.i[31038,31051] [2021-01-06 22:52:44,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:52:44,108 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 22:52:44,146 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_longest-1.i[30286,30299] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2021-01-06 22:52:44,153 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_longest-1.i[31038,31051] [2021-01-06 22:52:44,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:52:44,283 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:52:44,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44 WrapperNode [2021-01-06 22:52:44,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:52:44,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:52:44,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:52:44,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:52:44,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:52:44,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:52:44,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:52:44,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:52:44,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (1/1) ... [2021-01-06 22:52:44,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:52:44,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:52:44,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:52:44,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:52:44,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (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 22:52:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-06 22:52:44,484 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-06 22:52:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-06 22:52:44,484 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-06 22:52:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-06 22:52:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:52:44,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:52:44,487 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 22:52:44,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:52:44,817 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 22:52:44,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:52:44 BoogieIcfgContainer [2021-01-06 22:52:44,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:52:44,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:52:44,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:52:44,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:52:44,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:52:43" (1/3) ... [2021-01-06 22:52:44,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb90efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:52:44, skipping insertion in model container [2021-01-06 22:52:44,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:52:44" (2/3) ... [2021-01-06 22:52:44,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb90efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:52:44, skipping insertion in model container [2021-01-06 22:52:44,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:52:44" (3/3) ... [2021-01-06 22:52:44,831 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-01-06 22:52:44,838 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:52:44,838 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:52:44,843 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 22:52:44,844 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:52:44,900 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,900 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,900 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,901 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,901 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,901 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,901 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,902 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,902 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,902 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,915 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,915 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,916 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,916 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,918 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,919 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,919 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,919 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,919 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,919 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,925 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,925 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,925 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,925 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,926 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,926 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:52:44,928 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-06 22:52:44,948 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 22:52:44,976 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:52:44,976 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:52:44,976 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:52:44,976 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:52:44,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:52:44,977 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:52:44,977 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:52:44,977 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:52:44,990 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:52:44,992 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:44,996 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:44,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2021-01-06 22:52:45,050 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2021-01-06 22:52:45,051 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-01-06 22:52:45,056 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 6. Compared 89 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 22:52:45,059 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2021-01-06 22:52:47,541 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-01-06 22:52:47,674 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-01-06 22:52:47,970 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2021-01-06 22:52:48,090 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-01-06 22:52:48,097 INFO L131 LiptonReduction]: Checked pairs total: 1148 [2021-01-06 22:52:48,097 INFO L133 LiptonReduction]: Total number of compositions: 55 [2021-01-06 22:52:48,107 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-01-06 22:52:48,120 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2021-01-06 22:52:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 22:52:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 22:52:48,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1040753464, now seen corresponding path program 1 times [2021-01-06 22:52:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055694485] [2021-01-06 22:52:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:48,439 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 22:52:48,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055694485] [2021-01-06 22:52:48,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:48,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:52:48,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962971863] [2021-01-06 22:52:48,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:52:48,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:52:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:52:48,464 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-01-06 22:52:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:48,544 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2021-01-06 22:52:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:52:48,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 22:52:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:48,557 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:52:48,557 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 22:52:48,559 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 22:52:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 22:52:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-01-06 22:52:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:52:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2021-01-06 22:52:48,601 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2021-01-06 22:52:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:48,602 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2021-01-06 22:52:48,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:52:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2021-01-06 22:52:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:48,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 22:52:48,604 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1204102091, now seen corresponding path program 1 times [2021-01-06 22:52:48,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530439466] [2021-01-06 22:52:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:48,722 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 22:52:48,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530439466] [2021-01-06 22:52:48,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:48,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12228130] [2021-01-06 22:52:48,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:48,731 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2021-01-06 22:52:48,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:48,778 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2021-01-06 22:52:48,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:48,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:48,780 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:52:48,781 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 22:52:48,781 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 22:52:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 22:52:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2021-01-06 22:52:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:52:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2021-01-06 22:52:48,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2021-01-06 22:52:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:48,793 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2021-01-06 22:52:48,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2021-01-06 22:52:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:48,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 22:52:48,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 563301308, now seen corresponding path program 1 times [2021-01-06 22:52:48,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813905832] [2021-01-06 22:52:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:48,862 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 22:52:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813905832] [2021-01-06 22:52:48,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171698964] [2021-01-06 22:52:48,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:48,865 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2021-01-06 22:52:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:48,900 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2021-01-06 22:52:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:52:48,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:48,902 INFO L225 Difference]: With dead ends: 73 [2021-01-06 22:52:48,902 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 22:52:48,902 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 22:52:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 22:52:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-01-06 22:52:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:52:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2021-01-06 22:52:48,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2021-01-06 22:52:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:48,913 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2021-01-06 22:52:48,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2021-01-06 22:52:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:52:48,914 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:48,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:48,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 22:52:48,914 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash 563669588, now seen corresponding path program 2 times [2021-01-06 22:52:48,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:48,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83680607] [2021-01-06 22:52:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,028 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 22:52:49,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83680607] [2021-01-06 22:52:49,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:49,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:52:49,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123602234] [2021-01-06 22:52:49,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:52:49,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:49,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:52:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:52:49,031 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2021-01-06 22:52:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:49,077 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2021-01-06 22:52:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:49,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:52:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:49,079 INFO L225 Difference]: With dead ends: 86 [2021-01-06 22:52:49,079 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 22:52:49,080 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 22:52:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 22:52:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-01-06 22:52:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:52:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2021-01-06 22:52:49,092 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2021-01-06 22:52:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:49,092 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2021-01-06 22:52:49,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:52:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2021-01-06 22:52:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:49,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:49,094 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:49,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 22:52:49,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1304831828, now seen corresponding path program 2 times [2021-01-06 22:52:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:49,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249533309] [2021-01-06 22:52:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,210 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 22:52:49,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249533309] [2021-01-06 22:52:49,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660017838] [2021-01-06 22:52:49,211 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 22:52:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:49,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:49,475 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 22:52:49,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:49,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-01-06 22:52:49,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654390464] [2021-01-06 22:52:49,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:52:49,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:52:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:49,483 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2021-01-06 22:52:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:49,655 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2021-01-06 22:52:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:52:49,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-01-06 22:52:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:49,658 INFO L225 Difference]: With dead ends: 121 [2021-01-06 22:52:49,658 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:52:49,663 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 22:52:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:52:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2021-01-06 22:52:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:52:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2021-01-06 22:52:49,685 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2021-01-06 22:52:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:49,686 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2021-01-06 22:52:49,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:52:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2021-01-06 22:52:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:49,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:49,687 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:49,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:49,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash 282471732, now seen corresponding path program 3 times [2021-01-06 22:52:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907898223] [2021-01-06 22:52:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:49,989 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 22:52:49,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907898223] [2021-01-06 22:52:49,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875864359] [2021-01-06 22:52:49,990 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 22:52:50,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:50,111 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 22:52:50,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:50,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-01-06 22:52:50,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649596497] [2021-01-06 22:52:50,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:52:50,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:52:50,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:50,114 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2021-01-06 22:52:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:50,151 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2021-01-06 22:52:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:52:50,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-06 22:52:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:50,154 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:52:50,154 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 22:52:50,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 22:52:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-01-06 22:52:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:52:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2021-01-06 22:52:50,163 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2021-01-06 22:52:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:50,163 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2021-01-06 22:52:50,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:52:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2021-01-06 22:52:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:50,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:50,164 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:50,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:50,378 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash 293888412, now seen corresponding path program 4 times [2021-01-06 22:52:50,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:50,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780907644] [2021-01-06 22:52:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:50,440 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 22:52:50,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780907644] [2021-01-06 22:52:50,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438447585] [2021-01-06 22:52:50,441 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 22:52:50,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:50,575 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 22:52:50,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:50,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-01-06 22:52:50,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615752799] [2021-01-06 22:52:50,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:52:50,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:50,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:52:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:50,578 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2021-01-06 22:52:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:50,629 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2021-01-06 22:52:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:50,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-06 22:52:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:50,630 INFO L225 Difference]: With dead ends: 95 [2021-01-06 22:52:50,631 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 22:52:50,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:52:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 22:52:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-01-06 22:52:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 22:52:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2021-01-06 22:52:50,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2021-01-06 22:52:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:50,639 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2021-01-06 22:52:50,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:52:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2021-01-06 22:52:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 22:52:50,640 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:50,640 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:50,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash 293910732, now seen corresponding path program 5 times [2021-01-06 22:52:50,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:50,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497952009] [2021-01-06 22:52:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:50,915 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 22:52:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497952009] [2021-01-06 22:52:50,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917187277] [2021-01-06 22:52:50,915 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 22:52:50,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:52:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:51,067 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 22:52:51,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:51,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-01-06 22:52:51,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007619110] [2021-01-06 22:52:51,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:52:51,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:52:51,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:52:51,070 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2021-01-06 22:52:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,173 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2021-01-06 22:52:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:51,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-01-06 22:52:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,175 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:52:51,175 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:52:51,176 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 22:52:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:52:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2021-01-06 22:52:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 22:52:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2021-01-06 22:52:51,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2021-01-06 22:52:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,197 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2021-01-06 22:52:51,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:52:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2021-01-06 22:52:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:51,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:51,401 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1795907071, now seen corresponding path program 1 times [2021-01-06 22:52:51,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581687712] [2021-01-06 22:52:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,504 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 22:52:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581687712] [2021-01-06 22:52:51,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:51,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:51,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116503724] [2021-01-06 22:52:51,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:51,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:51,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:51,507 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2021-01-06 22:52:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,552 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2021-01-06 22:52:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:51,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,554 INFO L225 Difference]: With dead ends: 101 [2021-01-06 22:52:51,554 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 22:52:51,555 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 22:52:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 22:52:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2021-01-06 22:52:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 22:52:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2021-01-06 22:52:51,560 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2021-01-06 22:52:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,560 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2021-01-06 22:52:51,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2021-01-06 22:52:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:51,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 22:52:51,562 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1796275351, now seen corresponding path program 2 times [2021-01-06 22:52:51,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288318374] [2021-01-06 22:52:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,616 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 22:52:51,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288318374] [2021-01-06 22:52:51,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:51,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:51,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159704706] [2021-01-06 22:52:51,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:51,618 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2021-01-06 22:52:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,683 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2021-01-06 22:52:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:51,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,685 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:52:51,685 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 22:52:51,685 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 22:52:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 22:52:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2021-01-06 22:52:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 22:52:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2021-01-06 22:52:51,690 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2021-01-06 22:52:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,690 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2021-01-06 22:52:51,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2021-01-06 22:52:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:51,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 22:52:51,691 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1458823941, now seen corresponding path program 3 times [2021-01-06 22:52:51,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714358077] [2021-01-06 22:52:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,741 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 22:52:51,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714358077] [2021-01-06 22:52:51,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:52:51,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:52:51,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621912156] [2021-01-06 22:52:51,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:52:51,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:52:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:52:51,744 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2021-01-06 22:52:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:51,809 INFO L93 Difference]: Finished difference Result 110 states and 262 transitions. [2021-01-06 22:52:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:51,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:52:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:51,811 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:52:51,811 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:52:51,811 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 22:52:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:52:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-01-06 22:52:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 22:52:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2021-01-06 22:52:51,816 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2021-01-06 22:52:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:51,816 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2021-01-06 22:52:51,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:52:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2021-01-06 22:52:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:51,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:51,817 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:51,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 22:52:51,818 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash 166689468, now seen corresponding path program 6 times [2021-01-06 22:52:51,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:51,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815723994] [2021-01-06 22:52:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:51,880 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 22:52:51,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815723994] [2021-01-06 22:52:51,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31439805] [2021-01-06 22:52:51,881 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 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 22:52:51,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:51,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:52,010 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 22:52:52,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:52,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064396199] [2021-01-06 22:52:52,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:52,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:52,012 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2021-01-06 22:52:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:52,046 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2021-01-06 22:52:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:52:52,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:52,048 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:52:52,048 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:52:52,048 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 22:52:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:52:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2021-01-06 22:52:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 22:52:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2021-01-06 22:52:52,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2021-01-06 22:52:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:52,053 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2021-01-06 22:52:52,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2021-01-06 22:52:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:52,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:52,054 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:52,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 22:52:52,269 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 520606548, now seen corresponding path program 7 times [2021-01-06 22:52:52,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:52,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257048899] [2021-01-06 22:52:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,355 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 22:52:52,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257048899] [2021-01-06 22:52:52,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250571701] [2021-01-06 22:52:52,356 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 22:52:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:52,512 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 22:52:52,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:52,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592410028] [2021-01-06 22:52:52,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:52,515 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2021-01-06 22:52:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:52,558 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2021-01-06 22:52:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:52:52,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:52,560 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:52:52,560 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:52:52,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:52:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:52:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-01-06 22:52:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 22:52:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2021-01-06 22:52:52,572 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2021-01-06 22:52:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:52,572 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2021-01-06 22:52:52,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2021-01-06 22:52:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:52,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:52,573 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:52,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:52,787 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 521298468, now seen corresponding path program 8 times [2021-01-06 22:52:52,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:52,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941158608] [2021-01-06 22:52:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:52,878 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 22:52:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941158608] [2021-01-06 22:52:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767031242] [2021-01-06 22:52:52,878 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 22:52:52,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:53,028 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 22:52:53,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:53,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890834635] [2021-01-06 22:52:53,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:53,031 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2021-01-06 22:52:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:53,095 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2021-01-06 22:52:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:53,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:53,097 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:52:53,097 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 22:52:53,098 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 22:52:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 22:52:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-01-06 22:52:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 22:52:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2021-01-06 22:52:53,104 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2021-01-06 22:52:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:53,104 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2021-01-06 22:52:53,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2021-01-06 22:52:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:52:53,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:53,105 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:53,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 22:52:53,319 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:53,320 INFO L82 PathProgramCache]: Analyzing trace with hash 521320788, now seen corresponding path program 9 times [2021-01-06 22:52:53,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:53,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848407081] [2021-01-06 22:52:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:53,377 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 22:52:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848407081] [2021-01-06 22:52:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648958275] [2021-01-06 22:52:53,378 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 22:52:53,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:53,526 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 22:52:53,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:53,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70987881] [2021-01-06 22:52:53,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:53,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:53,531 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2021-01-06 22:52:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:53,633 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2021-01-06 22:52:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:52:53,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 22:52:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:53,638 INFO L225 Difference]: With dead ends: 124 [2021-01-06 22:52:53,638 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 22:52:53,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:52:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 22:52:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-01-06 22:52:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 22:52:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2021-01-06 22:52:53,647 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2021-01-06 22:52:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:53,648 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2021-01-06 22:52:53,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2021-01-06 22:52:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:53,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:53,649 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:53,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 22:52:53,864 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 913752204, now seen corresponding path program 3 times [2021-01-06 22:52:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:53,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529053384] [2021-01-06 22:52:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:53,976 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 22:52:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529053384] [2021-01-06 22:52:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546153072] [2021-01-06 22:52:53,976 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 22:52:54,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:52:54,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:52:54,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:54,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:54,142 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 22:52:54,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:54,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:52:54,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175191073] [2021-01-06 22:52:54,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:52:54,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:52:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:52:54,144 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2021-01-06 22:52:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:54,300 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2021-01-06 22:52:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:54,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:52:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:54,302 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:52:54,303 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 22:52:54,303 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 22:52:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 22:52:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-01-06 22:52:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 22:52:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2021-01-06 22:52:54,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2021-01-06 22:52:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:54,309 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2021-01-06 22:52:54,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:52:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2021-01-06 22:52:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:54,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:54,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:54,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 22:52:54,525 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash 187063968, now seen corresponding path program 4 times [2021-01-06 22:52:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:54,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771611717] [2021-01-06 22:52:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:54,607 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 22:52:54,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771611717] [2021-01-06 22:52:54,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084706128] [2021-01-06 22:52:54,608 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 22:52:54,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:54,756 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 22:52:54,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:54,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731738501] [2021-01-06 22:52:54,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:54,758 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 11 states. [2021-01-06 22:52:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:54,839 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2021-01-06 22:52:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:52:54,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:54,840 INFO L225 Difference]: With dead ends: 126 [2021-01-06 22:52:54,841 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 22:52:54,841 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 22:52:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 22:52:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-01-06 22:52:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 22:52:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2021-01-06 22:52:54,846 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2021-01-06 22:52:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:54,846 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2021-01-06 22:52:54,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2021-01-06 22:52:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:54,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:54,847 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:55,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 22:52:55,062 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash 187432248, now seen corresponding path program 5 times [2021-01-06 22:52:55,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:55,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358095540] [2021-01-06 22:52:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:55,143 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 22:52:55,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358095540] [2021-01-06 22:52:55,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936829173] [2021-01-06 22:52:55,144 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 22:52:55,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:55,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:55,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:52:55,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:52:55,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:55,330 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 22:52:55,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:55,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:55,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012470568] [2021-01-06 22:52:55,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:55,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:55,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:55,333 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 11 states. [2021-01-06 22:52:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:55,535 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2021-01-06 22:52:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:52:55,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:55,537 INFO L225 Difference]: With dead ends: 155 [2021-01-06 22:52:55,537 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 22:52:55,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:52:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 22:52:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2021-01-06 22:52:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 22:52:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2021-01-06 22:52:55,543 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 11 [2021-01-06 22:52:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:55,543 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2021-01-06 22:52:55,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2021-01-06 22:52:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:55,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:55,544 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:55,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 22:52:55,760 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:55,761 INFO L82 PathProgramCache]: Analyzing trace with hash -161455279, now seen corresponding path program 6 times [2021-01-06 22:52:55,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:55,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093909645] [2021-01-06 22:52:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:55,832 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 22:52:55,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093909645] [2021-01-06 22:52:55,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795498328] [2021-01-06 22:52:55,833 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 22:52:55,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:55,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:55,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:55,971 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 22:52:55,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:55,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:55,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422605801] [2021-01-06 22:52:55,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:55,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:55,973 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 11 states. [2021-01-06 22:52:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:56,062 INFO L93 Difference]: Finished difference Result 136 states and 326 transitions. [2021-01-06 22:52:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:52:56,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:56,064 INFO L225 Difference]: With dead ends: 136 [2021-01-06 22:52:56,064 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 22:52:56,065 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 22:52:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 22:52:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-01-06 22:52:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 22:52:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 277 transitions. [2021-01-06 22:52:56,069 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 277 transitions. Word has length 11 [2021-01-06 22:52:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:56,069 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 277 transitions. [2021-01-06 22:52:56,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 277 transitions. [2021-01-06 22:52:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:56,070 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:56,070 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:56,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:56,284 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -150038599, now seen corresponding path program 7 times [2021-01-06 22:52:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:56,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754873902] [2021-01-06 22:52:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,345 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 22:52:56,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754873902] [2021-01-06 22:52:56,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548849465] [2021-01-06 22:52:56,346 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 22:52:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:56,499 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 22:52:56,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544573940] [2021-01-06 22:52:56,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:56,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:56,502 INFO L87 Difference]: Start difference. First operand 111 states and 277 transitions. Second operand 11 states. [2021-01-06 22:52:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:56,610 INFO L93 Difference]: Finished difference Result 137 states and 330 transitions. [2021-01-06 22:52:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:52:56,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:56,612 INFO L225 Difference]: With dead ends: 137 [2021-01-06 22:52:56,612 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 22:52:56,613 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 22:52:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 22:52:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2021-01-06 22:52:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 22:52:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2021-01-06 22:52:56,618 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 11 [2021-01-06 22:52:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:56,619 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2021-01-06 22:52:56,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2021-01-06 22:52:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:56,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:56,620 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:56,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-06 22:52:56,835 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -150016279, now seen corresponding path program 8 times [2021-01-06 22:52:56,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:56,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273262774] [2021-01-06 22:52:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:56,923 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 22:52:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273262774] [2021-01-06 22:52:56,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16626191] [2021-01-06 22:52:56,924 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 22:52:56,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:57,049 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 22:52:57,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:57,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:57,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894120042] [2021-01-06 22:52:57,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:57,051 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 11 states. [2021-01-06 22:52:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:57,243 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2021-01-06 22:52:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:57,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:57,245 INFO L225 Difference]: With dead ends: 160 [2021-01-06 22:52:57,245 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 22:52:57,245 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 22:52:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 22:52:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2021-01-06 22:52:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 22:52:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2021-01-06 22:52:57,251 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 11 [2021-01-06 22:52:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:57,251 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2021-01-06 22:52:57,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2021-01-06 22:52:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:57,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:57,252 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:57,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:57,466 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1919347069, now seen corresponding path program 9 times [2021-01-06 22:52:57,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:57,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568304481] [2021-01-06 22:52:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:57,524 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 22:52:57,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568304481] [2021-01-06 22:52:57,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744767530] [2021-01-06 22:52:57,524 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 22:52:57,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:52:57,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:57,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:57,645 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 22:52:57,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:57,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:57,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831968113] [2021-01-06 22:52:57,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:57,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:57,648 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 11 states. [2021-01-06 22:52:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:57,711 INFO L93 Difference]: Finished difference Result 136 states and 330 transitions. [2021-01-06 22:52:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:52:57,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:57,713 INFO L225 Difference]: With dead ends: 136 [2021-01-06 22:52:57,713 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 22:52:57,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:52:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 22:52:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-01-06 22:52:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 22:52:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 282 transitions. [2021-01-06 22:52:57,718 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 282 transitions. Word has length 11 [2021-01-06 22:52:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:57,718 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 282 transitions. [2021-01-06 22:52:57,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 282 transitions. [2021-01-06 22:52:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:57,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:57,719 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:57,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 22:52:57,933 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2021703147, now seen corresponding path program 10 times [2021-01-06 22:52:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:57,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757927821] [2021-01-06 22:52:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:58,026 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 22:52:58,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757927821] [2021-01-06 22:52:58,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656413988] [2021-01-06 22:52:58,027 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 22:52:58,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:52:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:58,143 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 22:52:58,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:58,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217842762] [2021-01-06 22:52:58,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:58,147 INFO L87 Difference]: Start difference. First operand 112 states and 282 transitions. Second operand 11 states. [2021-01-06 22:52:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:58,220 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2021-01-06 22:52:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:52:58,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:58,221 INFO L225 Difference]: With dead ends: 142 [2021-01-06 22:52:58,222 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 22:52:58,222 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 22:52:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 22:52:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2021-01-06 22:52:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 22:52:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2021-01-06 22:52:58,227 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 11 [2021-01-06 22:52:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:58,227 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2021-01-06 22:52:58,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2021-01-06 22:52:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:58,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:58,228 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:58,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:52:58,443 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2021097717, now seen corresponding path program 11 times [2021-01-06 22:52:58,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:58,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546867410] [2021-01-06 22:52:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:58,498 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 22:52:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546867410] [2021-01-06 22:52:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600795906] [2021-01-06 22:52:58,498 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 22:52:58,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:52:58,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:58,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:58,635 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 22:52:58,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:58,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:58,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603822245] [2021-01-06 22:52:58,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:58,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:58,637 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand 11 states. [2021-01-06 22:52:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:58,734 INFO L93 Difference]: Finished difference Result 142 states and 340 transitions. [2021-01-06 22:52:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:52:58,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:58,739 INFO L225 Difference]: With dead ends: 142 [2021-01-06 22:52:58,739 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 22:52:58,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:52:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 22:52:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2021-01-06 22:52:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 22:52:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2021-01-06 22:52:58,747 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2021-01-06 22:52:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:58,747 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2021-01-06 22:52:58,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2021-01-06 22:52:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:58,748 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:58,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:58,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 22:52:58,963 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2021078280, now seen corresponding path program 12 times [2021-01-06 22:52:58,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:58,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375490811] [2021-01-06 22:52:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:59,018 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 22:52:59,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375490811] [2021-01-06 22:52:59,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111060833] [2021-01-06 22:52:59,019 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 22:52:59,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:52:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:52:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:59,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:59,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:52:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:52:59,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:59,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210306618] [2021-01-06 22:52:59,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:59,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:59,154 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 11 states. [2021-01-06 22:52:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:59,315 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2021-01-06 22:52:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:52:59,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:59,317 INFO L225 Difference]: With dead ends: 157 [2021-01-06 22:52:59,317 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 22:52:59,317 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 22:52:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 22:52:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-01-06 22:52:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 22:52:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2021-01-06 22:52:59,323 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 11 [2021-01-06 22:52:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:59,323 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2021-01-06 22:52:59,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2021-01-06 22:52:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:59,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:59,325 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:52:59,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 22:52:59,539 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:52:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:52:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2021075397, now seen corresponding path program 13 times [2021-01-06 22:52:59,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:52:59,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330142259] [2021-01-06 22:52:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:52:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:59,592 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 22:52:59,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330142259] [2021-01-06 22:52:59,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264110385] [2021-01-06 22:52:59,592 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 22:52:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:52:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:52:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:52:59,729 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 22:52:59,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:52:59,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-01-06 22:52:59,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576331762] [2021-01-06 22:52:59,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:52:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:52:59,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:52:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:52:59,731 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand 11 states. [2021-01-06 22:52:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:52:59,977 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2021-01-06 22:52:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:52:59,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 22:52:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:52:59,982 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:52:59,982 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 22:52:59,982 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 22:52:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 22:52:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-01-06 22:52:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 22:52:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 283 transitions. [2021-01-06 22:52:59,987 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 283 transitions. Word has length 11 [2021-01-06 22:52:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:52:59,987 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 283 transitions. [2021-01-06 22:52:59,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:52:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 283 transitions. [2021-01-06 22:52:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:52:59,988 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:52:59,988 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:00,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 22:53:00,204 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash 872406580, now seen corresponding path program 10 times [2021-01-06 22:53:00,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:00,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609065238] [2021-01-06 22:53:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:00,285 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 22:53:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609065238] [2021-01-06 22:53:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652966546] [2021-01-06 22:53:00,285 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 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 22:53:00,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:00,434 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 22:53:00,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:00,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819974569] [2021-01-06 22:53:00,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:00,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:00,437 INFO L87 Difference]: Start difference. First operand 112 states and 283 transitions. Second operand 14 states. [2021-01-06 22:53:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:00,480 INFO L93 Difference]: Finished difference Result 139 states and 337 transitions. [2021-01-06 22:53:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:53:00,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:53:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:00,481 INFO L225 Difference]: With dead ends: 139 [2021-01-06 22:53:00,482 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 22:53:00,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 22:53:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-01-06 22:53:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 22:53:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2021-01-06 22:53:00,487 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2021-01-06 22:53:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:00,487 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2021-01-06 22:53:00,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2021-01-06 22:53:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:53:00,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:00,488 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:00,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 22:53:00,701 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1041065828, now seen corresponding path program 11 times [2021-01-06 22:53:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:00,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806634074] [2021-01-06 22:53:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:00,794 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 22:53:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806634074] [2021-01-06 22:53:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572132255] [2021-01-06 22:53:00,794 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 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 22:53:00,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:00,981 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 22:53:00,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:00,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:00,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353326618] [2021-01-06 22:53:00,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:00,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:00,985 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2021-01-06 22:53:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:01,052 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2021-01-06 22:53:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:53:01,052 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:53:01,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:01,054 INFO L225 Difference]: With dead ends: 150 [2021-01-06 22:53:01,054 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 22:53:01,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 22:53:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-01-06 22:53:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 22:53:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2021-01-06 22:53:01,059 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2021-01-06 22:53:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:01,060 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2021-01-06 22:53:01,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2021-01-06 22:53:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:53:01,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:01,061 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:01,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 22:53:01,274 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1019616308, now seen corresponding path program 12 times [2021-01-06 22:53:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:01,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121084310] [2021-01-06 22:53:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:01,379 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 22:53:01,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121084310] [2021-01-06 22:53:01,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413881319] [2021-01-06 22:53:01,380 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 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 22:53:01,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:01,550 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 22:53:01,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:01,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337615594] [2021-01-06 22:53:01,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:01,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:01,553 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2021-01-06 22:53:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:01,641 INFO L93 Difference]: Finished difference Result 148 states and 353 transitions. [2021-01-06 22:53:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:01,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:53:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:01,643 INFO L225 Difference]: With dead ends: 148 [2021-01-06 22:53:01,643 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 22:53:01,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 22:53:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2021-01-06 22:53:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 22:53:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 296 transitions. [2021-01-06 22:53:01,648 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 296 transitions. Word has length 11 [2021-01-06 22:53:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:01,648 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 296 transitions. [2021-01-06 22:53:01,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 296 transitions. [2021-01-06 22:53:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:53:01,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:01,649 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:01,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:01,863 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1018924388, now seen corresponding path program 13 times [2021-01-06 22:53:01,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401866364] [2021-01-06 22:53:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:01,923 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 22:53:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401866364] [2021-01-06 22:53:01,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239216286] [2021-01-06 22:53:01,924 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 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 22:53:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:02,070 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 22:53:02,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:02,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:02,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893480335] [2021-01-06 22:53:02,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:02,073 INFO L87 Difference]: Start difference. First operand 118 states and 296 transitions. Second operand 14 states. [2021-01-06 22:53:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:02,184 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2021-01-06 22:53:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:02,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:53:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:02,186 INFO L225 Difference]: With dead ends: 147 [2021-01-06 22:53:02,187 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 22:53:02,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 22:53:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2021-01-06 22:53:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 22:53:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 303 transitions. [2021-01-06 22:53:02,192 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 303 transitions. Word has length 11 [2021-01-06 22:53:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:02,192 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 303 transitions. [2021-01-06 22:53:02,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 303 transitions. [2021-01-06 22:53:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:53:02,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:02,193 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:02,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:02,408 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1018902068, now seen corresponding path program 14 times [2021-01-06 22:53:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:02,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360323322] [2021-01-06 22:53:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:02,479 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 22:53:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360323322] [2021-01-06 22:53:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200383478] [2021-01-06 22:53:02,480 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 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 22:53:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:02,668 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 22:53:02,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:02,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:02,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743879696] [2021-01-06 22:53:02,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:02,670 INFO L87 Difference]: Start difference. First operand 120 states and 303 transitions. Second operand 14 states. [2021-01-06 22:53:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:02,856 INFO L93 Difference]: Finished difference Result 172 states and 415 transitions. [2021-01-06 22:53:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:02,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2021-01-06 22:53:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:02,858 INFO L225 Difference]: With dead ends: 172 [2021-01-06 22:53:02,859 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 22:53:02,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:53:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 22:53:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-01-06 22:53:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 22:53:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 320 transitions. [2021-01-06 22:53:02,864 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 320 transitions. Word has length 11 [2021-01-06 22:53:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:02,864 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 320 transitions. [2021-01-06 22:53:02,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 320 transitions. [2021-01-06 22:53:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:02,865 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:02,865 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:03,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:03,080 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:03,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1852535327, now seen corresponding path program 14 times [2021-01-06 22:53:03,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:03,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591796716] [2021-01-06 22:53:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:03,164 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 22:53:03,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591796716] [2021-01-06 22:53:03,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727505673] [2021-01-06 22:53:03,165 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 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 22:53:03,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:03,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:03,320 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 22:53:03,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:03,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:03,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320640949] [2021-01-06 22:53:03,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:03,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:03,323 INFO L87 Difference]: Start difference. First operand 125 states and 320 transitions. Second operand 14 states. [2021-01-06 22:53:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:03,428 INFO L93 Difference]: Finished difference Result 153 states and 371 transitions. [2021-01-06 22:53:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:03,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:03,430 INFO L225 Difference]: With dead ends: 153 [2021-01-06 22:53:03,430 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 22:53:03,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 22:53:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2021-01-06 22:53:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 22:53:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 332 transitions. [2021-01-06 22:53:03,435 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 332 transitions. Word has length 12 [2021-01-06 22:53:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:03,435 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 332 transitions. [2021-01-06 22:53:03,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 332 transitions. [2021-01-06 22:53:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:03,436 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:03,436 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:03,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 22:53:03,652 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1852903607, now seen corresponding path program 15 times [2021-01-06 22:53:03,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:03,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46712554] [2021-01-06 22:53:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:03,733 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 22:53:03,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46712554] [2021-01-06 22:53:03,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884512490] [2021-01-06 22:53:03,734 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 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 22:53:03,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:03,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:03,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:03,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:03,926 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 22:53:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:03,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886177262] [2021-01-06 22:53:03,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:03,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:03,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:03,929 INFO L87 Difference]: Start difference. First operand 131 states and 332 transitions. Second operand 13 states. [2021-01-06 22:53:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:04,152 INFO L93 Difference]: Finished difference Result 187 states and 451 transitions. [2021-01-06 22:53:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:04,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:04,154 INFO L225 Difference]: With dead ends: 187 [2021-01-06 22:53:04,154 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 22:53:04,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 22:53:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2021-01-06 22:53:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 22:53:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2021-01-06 22:53:04,161 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2021-01-06 22:53:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:04,162 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2021-01-06 22:53:04,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2021-01-06 22:53:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:04,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:04,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:04,364 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1504016080, now seen corresponding path program 16 times [2021-01-06 22:53:04,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:04,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258362459] [2021-01-06 22:53:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:04,449 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 22:53:04,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258362459] [2021-01-06 22:53:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994349377] [2021-01-06 22:53:04,450 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 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 22:53:04,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:04,614 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 22:53:04,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:04,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:04,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831232123] [2021-01-06 22:53:04,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:04,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:04,616 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2021-01-06 22:53:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:04,760 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2021-01-06 22:53:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:04,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:04,762 INFO L225 Difference]: With dead ends: 167 [2021-01-06 22:53:04,762 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 22:53:04,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 22:53:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-01-06 22:53:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 22:53:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2021-01-06 22:53:04,767 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 12 [2021-01-06 22:53:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:04,768 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2021-01-06 22:53:04,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2021-01-06 22:53:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:04,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:04,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:04,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 22:53:04,970 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1515432760, now seen corresponding path program 17 times [2021-01-06 22:53:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:04,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417517348] [2021-01-06 22:53:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:05,045 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 22:53:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417517348] [2021-01-06 22:53:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793381840] [2021-01-06 22:53:05,046 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 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 22:53:05,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:05,217 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 22:53:05,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:05,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:05,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520201255] [2021-01-06 22:53:05,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:05,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:05,219 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand 14 states. [2021-01-06 22:53:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:05,436 INFO L93 Difference]: Finished difference Result 165 states and 397 transitions. [2021-01-06 22:53:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:53:05,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:05,438 INFO L225 Difference]: With dead ends: 165 [2021-01-06 22:53:05,438 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 22:53:05,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 22:53:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2021-01-06 22:53:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 22:53:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 334 transitions. [2021-01-06 22:53:05,444 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 334 transitions. Word has length 12 [2021-01-06 22:53:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:05,445 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 334 transitions. [2021-01-06 22:53:05,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 334 transitions. [2021-01-06 22:53:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:05,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:05,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:05,661 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1515455080, now seen corresponding path program 18 times [2021-01-06 22:53:05,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:05,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391506735] [2021-01-06 22:53:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:05,725 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 22:53:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391506735] [2021-01-06 22:53:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573436793] [2021-01-06 22:53:05,725 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 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 22:53:05,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:53:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:05,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:05,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:05,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:05,907 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 22:53:05,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:05,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921373353] [2021-01-06 22:53:05,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:05,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:05,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:05,918 INFO L87 Difference]: Start difference. First operand 132 states and 334 transitions. Second operand 13 states. [2021-01-06 22:53:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:06,197 INFO L93 Difference]: Finished difference Result 190 states and 459 transitions. [2021-01-06 22:53:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:06,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:06,199 INFO L225 Difference]: With dead ends: 190 [2021-01-06 22:53:06,199 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 22:53:06,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 22:53:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 126. [2021-01-06 22:53:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 22:53:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2021-01-06 22:53:06,203 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2021-01-06 22:53:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:06,203 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2021-01-06 22:53:06,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2021-01-06 22:53:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:06,204 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:06,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:06,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 22:53:06,405 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -710148868, now seen corresponding path program 19 times [2021-01-06 22:53:06,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:06,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784696005] [2021-01-06 22:53:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:06,482 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 22:53:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784696005] [2021-01-06 22:53:06,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120690095] [2021-01-06 22:53:06,482 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 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 22:53:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:06,641 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 22:53:06,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:06,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:06,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56095168] [2021-01-06 22:53:06,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:06,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:06,643 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2021-01-06 22:53:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:06,810 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2021-01-06 22:53:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:06,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:06,812 INFO L225 Difference]: With dead ends: 171 [2021-01-06 22:53:06,812 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 22:53:06,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 22:53:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2021-01-06 22:53:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 22:53:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 328 transitions. [2021-01-06 22:53:06,817 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 328 transitions. Word has length 12 [2021-01-06 22:53:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:06,817 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 328 transitions. [2021-01-06 22:53:06,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 328 transitions. [2021-01-06 22:53:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:06,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:06,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:07,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:07,031 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash -356231788, now seen corresponding path program 20 times [2021-01-06 22:53:07,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:07,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609329080] [2021-01-06 22:53:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:07,096 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 22:53:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609329080] [2021-01-06 22:53:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063122822] [2021-01-06 22:53:07,096 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 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 22:53:07,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:07,279 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 22:53:07,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:07,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940224718] [2021-01-06 22:53:07,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:07,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:07,282 INFO L87 Difference]: Start difference. First operand 131 states and 328 transitions. Second operand 14 states. [2021-01-06 22:53:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:07,477 INFO L93 Difference]: Finished difference Result 183 states and 431 transitions. [2021-01-06 22:53:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:07,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:07,491 INFO L225 Difference]: With dead ends: 183 [2021-01-06 22:53:07,491 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 22:53:07,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 22:53:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2021-01-06 22:53:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 22:53:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2021-01-06 22:53:07,496 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2021-01-06 22:53:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:07,496 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2021-01-06 22:53:07,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2021-01-06 22:53:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:07,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:07,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:07,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 22:53:07,712 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -355626358, now seen corresponding path program 21 times [2021-01-06 22:53:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:07,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538722448] [2021-01-06 22:53:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:07,781 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 22:53:07,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538722448] [2021-01-06 22:53:07,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458870723] [2021-01-06 22:53:07,781 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 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 22:53:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:07,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:07,928 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 22:53:07,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:07,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:07,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761569368] [2021-01-06 22:53:07,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:07,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:07,930 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 14 states. [2021-01-06 22:53:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:08,149 INFO L93 Difference]: Finished difference Result 176 states and 423 transitions. [2021-01-06 22:53:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:08,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:08,151 INFO L225 Difference]: With dead ends: 176 [2021-01-06 22:53:08,152 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 22:53:08,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 22:53:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2021-01-06 22:53:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2021-01-06 22:53:08,158 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2021-01-06 22:53:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:08,158 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2021-01-06 22:53:08,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2021-01-06 22:53:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:08,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:08,159 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:08,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 22:53:08,373 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -355606921, now seen corresponding path program 22 times [2021-01-06 22:53:08,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:08,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104824245] [2021-01-06 22:53:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:08,441 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 22:53:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104824245] [2021-01-06 22:53:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659171626] [2021-01-06 22:53:08,441 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 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 22:53:08,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:08,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:08,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:08,574 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 22:53:08,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:08,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:08,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398445133] [2021-01-06 22:53:08,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:08,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:08,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:08,576 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2021-01-06 22:53:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:08,841 INFO L93 Difference]: Finished difference Result 194 states and 472 transitions. [2021-01-06 22:53:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:08,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:08,843 INFO L225 Difference]: With dead ends: 194 [2021-01-06 22:53:08,843 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 22:53:08,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:53:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 22:53:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2021-01-06 22:53:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2021-01-06 22:53:08,858 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2021-01-06 22:53:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:08,858 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2021-01-06 22:53:08,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2021-01-06 22:53:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:08,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:08,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:09,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 22:53:09,075 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -355604038, now seen corresponding path program 23 times [2021-01-06 22:53:09,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:09,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849648281] [2021-01-06 22:53:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:09,139 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 22:53:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849648281] [2021-01-06 22:53:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302050553] [2021-01-06 22:53:09,140 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 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 22:53:09,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:09,270 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 22:53:09,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:09,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:09,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481012234] [2021-01-06 22:53:09,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:09,272 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2021-01-06 22:53:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:09,630 INFO L93 Difference]: Finished difference Result 195 states and 472 transitions. [2021-01-06 22:53:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:09,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:09,632 INFO L225 Difference]: With dead ends: 195 [2021-01-06 22:53:09,632 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 22:53:09,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 22:53:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2021-01-06 22:53:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 22:53:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2021-01-06 22:53:09,637 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 12 [2021-01-06 22:53:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:09,637 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2021-01-06 22:53:09,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2021-01-06 22:53:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:09,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:09,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:09,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 22:53:09,844 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -629785520, now seen corresponding path program 24 times [2021-01-06 22:53:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:09,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383830388] [2021-01-06 22:53:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:09,917 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 22:53:09,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383830388] [2021-01-06 22:53:09,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637463637] [2021-01-06 22:53:09,917 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 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 22:53:09,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:09,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:09,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:09,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:10,075 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 22:53:10,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:10,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:10,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571585372] [2021-01-06 22:53:10,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:10,077 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 14 states. [2021-01-06 22:53:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:10,191 INFO L93 Difference]: Finished difference Result 168 states and 409 transitions. [2021-01-06 22:53:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:10,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:10,193 INFO L225 Difference]: With dead ends: 168 [2021-01-06 22:53:10,193 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 22:53:10,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 22:53:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2021-01-06 22:53:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 22:53:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2021-01-06 22:53:10,199 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2021-01-06 22:53:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:10,199 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2021-01-06 22:53:10,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2021-01-06 22:53:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:10,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:10,200 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:10,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:10,406 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:10,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:10,406 INFO L82 PathProgramCache]: Analyzing trace with hash -629782637, now seen corresponding path program 25 times [2021-01-06 22:53:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:10,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064586578] [2021-01-06 22:53:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:10,474 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 22:53:10,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064586578] [2021-01-06 22:53:10,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633382577] [2021-01-06 22:53:10,475 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 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 22:53:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:10,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:10,643 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 22:53:10,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:10,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106933887] [2021-01-06 22:53:10,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:10,645 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2021-01-06 22:53:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:10,781 INFO L93 Difference]: Finished difference Result 169 states and 411 transitions. [2021-01-06 22:53:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:10,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:10,784 INFO L225 Difference]: With dead ends: 169 [2021-01-06 22:53:10,784 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 22:53:10,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 22:53:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2021-01-06 22:53:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 346 transitions. [2021-01-06 22:53:10,788 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 346 transitions. Word has length 12 [2021-01-06 22:53:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:10,789 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 346 transitions. [2021-01-06 22:53:10,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 346 transitions. [2021-01-06 22:53:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:10,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:10,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:11,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 22:53:11,004 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1751709368, now seen corresponding path program 26 times [2021-01-06 22:53:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:11,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122529623] [2021-01-06 22:53:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:11,067 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 22:53:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122529623] [2021-01-06 22:53:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100655928] [2021-01-06 22:53:11,068 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 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 22:53:11,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:11,216 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 22:53:11,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:11,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403332735] [2021-01-06 22:53:11,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:11,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:11,218 INFO L87 Difference]: Start difference. First operand 136 states and 346 transitions. Second operand 14 states. [2021-01-06 22:53:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:11,353 INFO L93 Difference]: Finished difference Result 177 states and 427 transitions. [2021-01-06 22:53:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:11,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:11,355 INFO L225 Difference]: With dead ends: 177 [2021-01-06 22:53:11,355 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 22:53:11,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 22:53:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-01-06 22:53:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 22:53:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2021-01-06 22:53:11,360 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2021-01-06 22:53:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:11,360 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2021-01-06 22:53:11,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2021-01-06 22:53:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:11,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:11,361 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:11,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 22:53:11,576 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1751712251, now seen corresponding path program 27 times [2021-01-06 22:53:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:11,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972846363] [2021-01-06 22:53:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:11,639 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 22:53:11,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972846363] [2021-01-06 22:53:11,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70646350] [2021-01-06 22:53:11,640 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 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 22:53:11,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:11,787 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 22:53:11,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:11,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:11,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764374851] [2021-01-06 22:53:11,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:11,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:11,789 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2021-01-06 22:53:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:11,937 INFO L93 Difference]: Finished difference Result 174 states and 420 transitions. [2021-01-06 22:53:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:11,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:11,939 INFO L225 Difference]: With dead ends: 174 [2021-01-06 22:53:11,939 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 22:53:11,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:53:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 22:53:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2021-01-06 22:53:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 341 transitions. [2021-01-06 22:53:11,945 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 341 transitions. Word has length 12 [2021-01-06 22:53:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:11,945 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 341 transitions. [2021-01-06 22:53:11,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 341 transitions. [2021-01-06 22:53:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:11,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:11,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:12,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:12,148 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1770477698, now seen corresponding path program 28 times [2021-01-06 22:53:12,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:12,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030784540] [2021-01-06 22:53:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:12,213 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 22:53:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030784540] [2021-01-06 22:53:12,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432010638] [2021-01-06 22:53:12,214 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 22:53:12,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:12,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:12,373 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 22:53:12,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:12,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:12,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567262016] [2021-01-06 22:53:12,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:12,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:12,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:12,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:12,375 INFO L87 Difference]: Start difference. First operand 134 states and 341 transitions. Second operand 14 states. [2021-01-06 22:53:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:12,559 INFO L93 Difference]: Finished difference Result 183 states and 438 transitions. [2021-01-06 22:53:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:12,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:12,561 INFO L225 Difference]: With dead ends: 183 [2021-01-06 22:53:12,561 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 22:53:12,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 22:53:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2021-01-06 22:53:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 344 transitions. [2021-01-06 22:53:12,565 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 344 transitions. Word has length 12 [2021-01-06 22:53:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 344 transitions. [2021-01-06 22:53:12,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 344 transitions. [2021-01-06 22:53:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:12,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:12,566 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:12,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 22:53:12,767 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1770480581, now seen corresponding path program 29 times [2021-01-06 22:53:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:12,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402425895] [2021-01-06 22:53:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:12,828 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 22:53:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402425895] [2021-01-06 22:53:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402612008] [2021-01-06 22:53:12,828 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 22:53:12,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:12,989 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 22:53:12,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:12,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:12,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227027807] [2021-01-06 22:53:12,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:12,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:12,990 INFO L87 Difference]: Start difference. First operand 134 states and 344 transitions. Second operand 14 states. [2021-01-06 22:53:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:13,201 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2021-01-06 22:53:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:13,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:13,203 INFO L225 Difference]: With dead ends: 180 [2021-01-06 22:53:13,203 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 22:53:13,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 22:53:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-01-06 22:53:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2021-01-06 22:53:13,209 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2021-01-06 22:53:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:13,209 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2021-01-06 22:53:13,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2021-01-06 22:53:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:13,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:13,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:13,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:13,424 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1771083128, now seen corresponding path program 30 times [2021-01-06 22:53:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:13,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286299618] [2021-01-06 22:53:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:13,496 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 22:53:13,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286299618] [2021-01-06 22:53:13,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689003916] [2021-01-06 22:53:13,497 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 22:53:13,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:13,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:13,645 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 22:53:13,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:13,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940370916] [2021-01-06 22:53:13,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:13,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:13,647 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2021-01-06 22:53:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:13,890 INFO L93 Difference]: Finished difference Result 180 states and 435 transitions. [2021-01-06 22:53:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:13,891 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:13,893 INFO L225 Difference]: With dead ends: 180 [2021-01-06 22:53:13,893 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 22:53:13,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 22:53:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2021-01-06 22:53:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 22:53:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2021-01-06 22:53:13,911 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 12 [2021-01-06 22:53:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:13,912 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2021-01-06 22:53:13,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2021-01-06 22:53:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:13,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:13,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:14,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 22:53:14,113 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:14,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1771105448, now seen corresponding path program 31 times [2021-01-06 22:53:14,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:14,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579017495] [2021-01-06 22:53:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:14,171 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 22:53:14,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579017495] [2021-01-06 22:53:14,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601024821] [2021-01-06 22:53:14,171 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 22:53:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:14,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:14,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:14,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:14,323 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 22:53:14,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:14,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554046653] [2021-01-06 22:53:14,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:14,325 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 13 states. [2021-01-06 22:53:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:14,655 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2021-01-06 22:53:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:14,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:14,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:14,658 INFO L225 Difference]: With dead ends: 198 [2021-01-06 22:53:14,658 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 22:53:14,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:53:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 22:53:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2021-01-06 22:53:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2021-01-06 22:53:14,663 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2021-01-06 22:53:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2021-01-06 22:53:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2021-01-06 22:53:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:14,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:14,664 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:14,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 22:53:14,880 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1771172501, now seen corresponding path program 32 times [2021-01-06 22:53:14,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:14,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001004942] [2021-01-06 22:53:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:14,947 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 22:53:14,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001004942] [2021-01-06 22:53:14,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850670081] [2021-01-06 22:53:14,948 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 22:53:15,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:15,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:15,086 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 22:53:15,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:15,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-01-06 22:53:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293146623] [2021-01-06 22:53:15,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:53:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:53:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:53:15,088 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2021-01-06 22:53:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:15,337 INFO L93 Difference]: Finished difference Result 180 states and 433 transitions. [2021-01-06 22:53:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:15,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 22:53:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:15,339 INFO L225 Difference]: With dead ends: 180 [2021-01-06 22:53:15,339 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 22:53:15,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 22:53:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2021-01-06 22:53:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 22:53:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 350 transitions. [2021-01-06 22:53:15,343 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 350 transitions. Word has length 12 [2021-01-06 22:53:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:15,344 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 350 transitions. [2021-01-06 22:53:15,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:53:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 350 transitions. [2021-01-06 22:53:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:53:15,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:15,344 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:15,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 22:53:15,545 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1771194821, now seen corresponding path program 33 times [2021-01-06 22:53:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:15,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661169090] [2021-01-06 22:53:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:15,607 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 22:53:15,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661169090] [2021-01-06 22:53:15,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107546568] [2021-01-06 22:53:15,608 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 22:53:15,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:53:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:15,755 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 22:53:15,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:15,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-01-06 22:53:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393276061] [2021-01-06 22:53:15,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:53:15,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:53:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:53:15,757 INFO L87 Difference]: Start difference. First operand 136 states and 350 transitions. Second operand 13 states. [2021-01-06 22:53:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:16,145 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2021-01-06 22:53:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:16,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2021-01-06 22:53:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:16,147 INFO L225 Difference]: With dead ends: 198 [2021-01-06 22:53:16,147 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 22:53:16,148 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 22:53:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 22:53:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2021-01-06 22:53:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 22:53:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 342 transitions. [2021-01-06 22:53:16,152 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 342 transitions. Word has length 12 [2021-01-06 22:53:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:16,152 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 342 transitions. [2021-01-06 22:53:16,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:53:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 342 transitions. [2021-01-06 22:53:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:16,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:16,153 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:16,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-06 22:53:16,365 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1625739156, now seen corresponding path program 4 times [2021-01-06 22:53:16,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:16,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312426512] [2021-01-06 22:53:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:16,458 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 22:53:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312426512] [2021-01-06 22:53:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998651924] [2021-01-06 22:53:16,458 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 22:53:16,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:16,649 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:16,672 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 22:53:16,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:16,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:16,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372655768] [2021-01-06 22:53:16,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:16,674 INFO L87 Difference]: Start difference. First operand 134 states and 342 transitions. Second operand 18 states. [2021-01-06 22:53:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:16,885 INFO L93 Difference]: Finished difference Result 210 states and 508 transitions. [2021-01-06 22:53:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:16,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2021-01-06 22:53:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:16,892 INFO L225 Difference]: With dead ends: 210 [2021-01-06 22:53:16,892 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 22:53:16,893 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 22:53:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 22:53:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 145. [2021-01-06 22:53:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 22:53:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 379 transitions. [2021-01-06 22:53:16,899 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 379 transitions. Word has length 13 [2021-01-06 22:53:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:16,899 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 379 transitions. [2021-01-06 22:53:16,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 379 transitions. [2021-01-06 22:53:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:16,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:16,900 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:17,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:17,101 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1942539904, now seen corresponding path program 34 times [2021-01-06 22:53:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:17,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496473211] [2021-01-06 22:53:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:17,201 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 22:53:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496473211] [2021-01-06 22:53:17,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967447889] [2021-01-06 22:53:17,202 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 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 22:53:17,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:17,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:17,390 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 22:53:17,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:17,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331838185] [2021-01-06 22:53:17,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:17,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:17,392 INFO L87 Difference]: Start difference. First operand 145 states and 379 transitions. Second operand 16 states. [2021-01-06 22:53:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:17,526 INFO L93 Difference]: Finished difference Result 177 states and 439 transitions. [2021-01-06 22:53:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:17,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:17,528 INFO L225 Difference]: With dead ends: 177 [2021-01-06 22:53:17,528 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 22:53:17,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 22:53:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2021-01-06 22:53:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 22:53:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 394 transitions. [2021-01-06 22:53:17,534 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 394 transitions. Word has length 13 [2021-01-06 22:53:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:17,534 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 394 transitions. [2021-01-06 22:53:17,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 394 transitions. [2021-01-06 22:53:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:17,535 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:17,535 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:17,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 22:53:17,743 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1942908184, now seen corresponding path program 35 times [2021-01-06 22:53:17,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:17,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886948520] [2021-01-06 22:53:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:17,823 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 22:53:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886948520] [2021-01-06 22:53:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139041887] [2021-01-06 22:53:17,824 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 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 22:53:17,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:18,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:18,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:18,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:18,027 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 22:53:18,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:18,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:18,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113492245] [2021-01-06 22:53:18,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:18,029 INFO L87 Difference]: Start difference. First operand 152 states and 394 transitions. Second operand 16 states. [2021-01-06 22:53:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:18,401 INFO L93 Difference]: Finished difference Result 240 states and 582 transitions. [2021-01-06 22:53:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:18,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:18,403 INFO L225 Difference]: With dead ends: 240 [2021-01-06 22:53:18,403 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 22:53:18,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 22:53:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 144. [2021-01-06 22:53:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 22:53:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 383 transitions. [2021-01-06 22:53:18,407 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 383 transitions. Word has length 13 [2021-01-06 22:53:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:18,408 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 383 transitions. [2021-01-06 22:53:18,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 383 transitions. [2021-01-06 22:53:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:18,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:18,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:18,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:18,622 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -620144291, now seen corresponding path program 36 times [2021-01-06 22:53:18,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:18,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601039940] [2021-01-06 22:53:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:18,714 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 22:53:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601039940] [2021-01-06 22:53:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50937219] [2021-01-06 22:53:18,715 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 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 22:53:18,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:53:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:18,918 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 22:53:18,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:18,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:18,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665171008] [2021-01-06 22:53:18,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:18,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:18,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:18,920 INFO L87 Difference]: Start difference. First operand 144 states and 383 transitions. Second operand 16 states. [2021-01-06 22:53:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:19,142 INFO L93 Difference]: Finished difference Result 201 states and 492 transitions. [2021-01-06 22:53:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:19,142 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:19,144 INFO L225 Difference]: With dead ends: 201 [2021-01-06 22:53:19,144 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 22:53:19,144 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 22:53:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 22:53:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2021-01-06 22:53:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 22:53:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2021-01-06 22:53:19,149 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 13 [2021-01-06 22:53:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:19,150 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2021-01-06 22:53:19,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2021-01-06 22:53:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:19,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:19,151 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:19,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 22:53:19,363 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash -266227211, now seen corresponding path program 37 times [2021-01-06 22:53:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:19,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025401500] [2021-01-06 22:53:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:19,435 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 22:53:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025401500] [2021-01-06 22:53:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462535035] [2021-01-06 22:53:19,435 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 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 22:53:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:19,654 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 22:53:19,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:19,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:19,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184305030] [2021-01-06 22:53:19,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:19,656 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand 16 states. [2021-01-06 22:53:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:19,960 INFO L93 Difference]: Finished difference Result 214 states and 515 transitions. [2021-01-06 22:53:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:19,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:19,962 INFO L225 Difference]: With dead ends: 214 [2021-01-06 22:53:19,962 INFO L226 Difference]: Without dead ends: 212 [2021-01-06 22:53:19,963 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 22:53:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-01-06 22:53:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 150. [2021-01-06 22:53:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 22:53:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 396 transitions. [2021-01-06 22:53:19,968 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 396 transitions. Word has length 13 [2021-01-06 22:53:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:19,968 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 396 transitions. [2021-01-06 22:53:19,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 396 transitions. [2021-01-06 22:53:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:19,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:19,969 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:20,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 22:53:20,170 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -265621781, now seen corresponding path program 38 times [2021-01-06 22:53:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:20,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971510099] [2021-01-06 22:53:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:20,253 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 22:53:20,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971510099] [2021-01-06 22:53:20,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346064715] [2021-01-06 22:53:20,254 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 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 22:53:20,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:20,470 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 22:53:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:20,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041547213] [2021-01-06 22:53:20,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:20,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:20,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:20,471 INFO L87 Difference]: Start difference. First operand 150 states and 396 transitions. Second operand 16 states. [2021-01-06 22:53:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:20,790 INFO L93 Difference]: Finished difference Result 211 states and 513 transitions. [2021-01-06 22:53:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:53:20,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:20,792 INFO L225 Difference]: With dead ends: 211 [2021-01-06 22:53:20,792 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 22:53:20,793 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 22:53:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 22:53:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2021-01-06 22:53:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 22:53:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 408 transitions. [2021-01-06 22:53:20,797 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 408 transitions. Word has length 13 [2021-01-06 22:53:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:20,798 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 408 transitions. [2021-01-06 22:53:20,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 408 transitions. [2021-01-06 22:53:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:20,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:20,799 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:20,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:20,999 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash -265602344, now seen corresponding path program 39 times [2021-01-06 22:53:21,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:21,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803257993] [2021-01-06 22:53:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:21,073 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 22:53:21,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803257993] [2021-01-06 22:53:21,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894960550] [2021-01-06 22:53:21,074 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 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 22:53:21,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:21,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:53:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:21,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:21,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:21,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:21,280 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 22:53:21,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:21,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784485775] [2021-01-06 22:53:21,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:21,282 INFO L87 Difference]: Start difference. First operand 153 states and 408 transitions. Second operand 16 states. [2021-01-06 22:53:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:21,868 INFO L93 Difference]: Finished difference Result 249 states and 604 transitions. [2021-01-06 22:53:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:53:21,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:21,870 INFO L225 Difference]: With dead ends: 249 [2021-01-06 22:53:21,870 INFO L226 Difference]: Without dead ends: 237 [2021-01-06 22:53:21,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:53:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-01-06 22:53:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 148. [2021-01-06 22:53:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 22:53:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2021-01-06 22:53:21,875 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 13 [2021-01-06 22:53:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:21,875 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2021-01-06 22:53:21,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2021-01-06 22:53:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:21,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:21,876 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:22,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 22:53:22,089 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -539778060, now seen corresponding path program 40 times [2021-01-06 22:53:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:22,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533062985] [2021-01-06 22:53:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:22,176 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 22:53:22,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533062985] [2021-01-06 22:53:22,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771501047] [2021-01-06 22:53:22,177 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 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 22:53:22,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:22,389 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 22:53:22,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:22,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:22,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910900795] [2021-01-06 22:53:22,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:22,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:22,391 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand 16 states. [2021-01-06 22:53:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:22,651 INFO L93 Difference]: Finished difference Result 213 states and 526 transitions. [2021-01-06 22:53:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:22,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:22,654 INFO L225 Difference]: With dead ends: 213 [2021-01-06 22:53:22,654 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 22:53:22,654 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 22:53:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 22:53:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 154. [2021-01-06 22:53:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2021-01-06 22:53:22,659 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2021-01-06 22:53:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:22,659 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2021-01-06 22:53:22,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2021-01-06 22:53:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:22,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:22,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:22,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 22:53:22,874 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash -539691570, now seen corresponding path program 41 times [2021-01-06 22:53:22,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:22,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037714895] [2021-01-06 22:53:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:22,963 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 22:53:22,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037714895] [2021-01-06 22:53:22,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137480372] [2021-01-06 22:53:22,963 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 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 22:53:23,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:23,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:23,154 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 22:53:23,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:23,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:23,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993735020] [2021-01-06 22:53:23,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:23,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:23,156 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2021-01-06 22:53:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:23,420 INFO L93 Difference]: Finished difference Result 206 states and 513 transitions. [2021-01-06 22:53:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:23,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:23,423 INFO L225 Difference]: With dead ends: 206 [2021-01-06 22:53:23,423 INFO L226 Difference]: Without dead ends: 204 [2021-01-06 22:53:23,423 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 22:53:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-01-06 22:53:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2021-01-06 22:53:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2021-01-06 22:53:23,431 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2021-01-06 22:53:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:23,431 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2021-01-06 22:53:23,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2021-01-06 22:53:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:23,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:23,432 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:23,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 22:53:23,646 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1841716828, now seen corresponding path program 42 times [2021-01-06 22:53:23,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:23,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872797478] [2021-01-06 22:53:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:23,725 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 22:53:23,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872797478] [2021-01-06 22:53:23,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720437050] [2021-01-06 22:53:23,726 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 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 22:53:23,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:53:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:23,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:23,908 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 22:53:23,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:23,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313286732] [2021-01-06 22:53:23,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:23,910 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2021-01-06 22:53:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:24,197 INFO L93 Difference]: Finished difference Result 225 states and 550 transitions. [2021-01-06 22:53:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:24,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:24,200 INFO L225 Difference]: With dead ends: 225 [2021-01-06 22:53:24,200 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 22:53:24,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 22:53:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2021-01-06 22:53:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2021-01-06 22:53:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 414 transitions. [2021-01-06 22:53:24,206 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 414 transitions. Word has length 13 [2021-01-06 22:53:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:24,207 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 414 transitions. [2021-01-06 22:53:24,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 414 transitions. [2021-01-06 22:53:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:24,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:24,207 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:24,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:24,423 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1841803318, now seen corresponding path program 43 times [2021-01-06 22:53:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:24,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913833399] [2021-01-06 22:53:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:24,503 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 22:53:24,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913833399] [2021-01-06 22:53:24,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741060005] [2021-01-06 22:53:24,504 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 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 22:53:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:24,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:24,692 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 22:53:24,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:24,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228597666] [2021-01-06 22:53:24,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:24,694 INFO L87 Difference]: Start difference. First operand 156 states and 414 transitions. Second operand 16 states. [2021-01-06 22:53:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:25,016 INFO L93 Difference]: Finished difference Result 215 states and 530 transitions. [2021-01-06 22:53:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:25,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:25,018 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:25,019 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:25,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2021-01-06 22:53:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 22:53:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2021-01-06 22:53:25,024 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 13 [2021-01-06 22:53:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:25,024 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2021-01-06 22:53:25,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2021-01-06 22:53:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:25,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:25,025 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:25,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:25,239 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1860485158, now seen corresponding path program 44 times [2021-01-06 22:53:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556207809] [2021-01-06 22:53:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:25,316 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 22:53:25,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556207809] [2021-01-06 22:53:25,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884475675] [2021-01-06 22:53:25,317 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 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 22:53:25,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:25,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:25,494 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 22:53:25,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:25,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:25,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273261199] [2021-01-06 22:53:25,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:25,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:25,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:25,496 INFO L87 Difference]: Start difference. First operand 155 states and 411 transitions. Second operand 16 states. [2021-01-06 22:53:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:25,855 INFO L93 Difference]: Finished difference Result 225 states and 543 transitions. [2021-01-06 22:53:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:25,856 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:25,858 INFO L225 Difference]: With dead ends: 225 [2021-01-06 22:53:25,859 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 22:53:25,859 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 22:53:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 22:53:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2021-01-06 22:53:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 418 transitions. [2021-01-06 22:53:25,864 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 418 transitions. Word has length 13 [2021-01-06 22:53:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:25,864 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 418 transitions. [2021-01-06 22:53:25,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 418 transitions. [2021-01-06 22:53:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:25,865 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:25,865 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:26,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:26,066 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:26,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1861177078, now seen corresponding path program 45 times [2021-01-06 22:53:26,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:26,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632885244] [2021-01-06 22:53:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:26,154 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 22:53:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632885244] [2021-01-06 22:53:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655714371] [2021-01-06 22:53:26,155 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 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 22:53:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:53:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:26,325 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 22:53:26,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:26,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114131604] [2021-01-06 22:53:26,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:26,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:26,329 INFO L87 Difference]: Start difference. First operand 157 states and 418 transitions. Second operand 16 states. [2021-01-06 22:53:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:26,754 INFO L93 Difference]: Finished difference Result 226 states and 554 transitions. [2021-01-06 22:53:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:26,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:26,757 INFO L225 Difference]: With dead ends: 226 [2021-01-06 22:53:26,757 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 22:53:26,758 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 22:53:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 22:53:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2021-01-06 22:53:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 22:53:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 430 transitions. [2021-01-06 22:53:26,761 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 430 transitions. Word has length 13 [2021-01-06 22:53:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:26,762 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 430 transitions. [2021-01-06 22:53:26,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 430 transitions. [2021-01-06 22:53:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:26,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:26,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:26,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:26,972 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1861199398, now seen corresponding path program 46 times [2021-01-06 22:53:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:26,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670346586] [2021-01-06 22:53:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:27,051 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 22:53:27,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670346586] [2021-01-06 22:53:27,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838602264] [2021-01-06 22:53:27,051 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 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 22:53:27,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:27,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:27,230 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 22:53:27,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:27,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991868932] [2021-01-06 22:53:27,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:27,232 INFO L87 Difference]: Start difference. First operand 160 states and 430 transitions. Second operand 16 states. [2021-01-06 22:53:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:27,906 INFO L93 Difference]: Finished difference Result 276 states and 671 transitions. [2021-01-06 22:53:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:53:27,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:27,909 INFO L225 Difference]: With dead ends: 276 [2021-01-06 22:53:27,909 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 22:53:27,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:53:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 22:53:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 154. [2021-01-06 22:53:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 22:53:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 412 transitions. [2021-01-06 22:53:27,915 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 412 transitions. Word has length 13 [2021-01-06 22:53:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:27,915 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 412 transitions. [2021-01-06 22:53:27,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 412 transitions. [2021-01-06 22:53:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:27,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:27,916 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:28,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 22:53:28,130 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1863252838, now seen corresponding path program 47 times [2021-01-06 22:53:28,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:28,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324989116] [2021-01-06 22:53:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:28,206 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 22:53:28,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324989116] [2021-01-06 22:53:28,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64938274] [2021-01-06 22:53:28,207 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 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 22:53:28,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:28,373 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 22:53:28,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:28,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:28,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757158647] [2021-01-06 22:53:28,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:28,375 INFO L87 Difference]: Start difference. First operand 154 states and 412 transitions. Second operand 16 states. [2021-01-06 22:53:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:28,792 INFO L93 Difference]: Finished difference Result 230 states and 561 transitions. [2021-01-06 22:53:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:53:28,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:28,795 INFO L225 Difference]: With dead ends: 230 [2021-01-06 22:53:28,795 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 22:53:28,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:53:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 22:53:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-01-06 22:53:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 22:53:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 417 transitions. [2021-01-06 22:53:28,800 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 417 transitions. Word has length 13 [2021-01-06 22:53:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:28,800 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 417 transitions. [2021-01-06 22:53:28,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 417 transitions. [2021-01-06 22:53:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:28,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:28,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:29,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:29,004 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1863858268, now seen corresponding path program 48 times [2021-01-06 22:53:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:29,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403412142] [2021-01-06 22:53:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:29,087 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 22:53:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403412142] [2021-01-06 22:53:29,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902424159] [2021-01-06 22:53:29,088 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 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 22:53:29,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:29,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:29,270 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 22:53:29,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:29,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694776408] [2021-01-06 22:53:29,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:29,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:29,271 INFO L87 Difference]: Start difference. First operand 155 states and 417 transitions. Second operand 16 states. [2021-01-06 22:53:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:29,685 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2021-01-06 22:53:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:29,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:29,687 INFO L225 Difference]: With dead ends: 222 [2021-01-06 22:53:29,687 INFO L226 Difference]: Without dead ends: 220 [2021-01-06 22:53:29,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:53:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-01-06 22:53:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2021-01-06 22:53:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 424 transitions. [2021-01-06 22:53:29,692 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 424 transitions. Word has length 13 [2021-01-06 22:53:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:29,692 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 424 transitions. [2021-01-06 22:53:29,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 424 transitions. [2021-01-06 22:53:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:29,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:29,693 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:29,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 22:53:29,894 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1863877705, now seen corresponding path program 49 times [2021-01-06 22:53:29,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73009468] [2021-01-06 22:53:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:29,986 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 22:53:29,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73009468] [2021-01-06 22:53:29,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632567343] [2021-01-06 22:53:29,986 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 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 22:53:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:30,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:30,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:30,178 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 22:53:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308649850] [2021-01-06 22:53:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:30,180 INFO L87 Difference]: Start difference. First operand 157 states and 424 transitions. Second operand 16 states. [2021-01-06 22:53:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:30,919 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2021-01-06 22:53:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:53:30,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:30,922 INFO L225 Difference]: With dead ends: 266 [2021-01-06 22:53:30,922 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 22:53:30,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:53:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 22:53:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 153. [2021-01-06 22:53:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 22:53:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 411 transitions. [2021-01-06 22:53:30,927 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 411 transitions. Word has length 13 [2021-01-06 22:53:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:30,927 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 411 transitions. [2021-01-06 22:53:30,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 411 transitions. [2021-01-06 22:53:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:30,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:30,928 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:31,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:31,144 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1951482845, now seen corresponding path program 50 times [2021-01-06 22:53:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:31,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101145720] [2021-01-06 22:53:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:31,225 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 22:53:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101145720] [2021-01-06 22:53:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359375628] [2021-01-06 22:53:31,225 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 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 22:53:31,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:31,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:31,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:31,396 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 22:53:31,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:31,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342934784] [2021-01-06 22:53:31,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:31,398 INFO L87 Difference]: Start difference. First operand 153 states and 411 transitions. Second operand 16 states. [2021-01-06 22:53:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:31,575 INFO L93 Difference]: Finished difference Result 202 states and 511 transitions. [2021-01-06 22:53:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:31,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:31,577 INFO L225 Difference]: With dead ends: 202 [2021-01-06 22:53:31,578 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 22:53:31,578 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 22:53:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 22:53:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2021-01-06 22:53:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 22:53:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2021-01-06 22:53:31,582 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2021-01-06 22:53:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:31,582 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2021-01-06 22:53:31,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2021-01-06 22:53:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:31,583 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:31,583 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:31,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 22:53:31,796 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1951485728, now seen corresponding path program 51 times [2021-01-06 22:53:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:31,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783143328] [2021-01-06 22:53:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:31,873 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 22:53:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783143328] [2021-01-06 22:53:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556881643] [2021-01-06 22:53:31,874 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 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 22:53:31,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:31,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:32,058 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 22:53:32,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:32,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415518140] [2021-01-06 22:53:32,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:32,060 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2021-01-06 22:53:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:32,301 INFO L93 Difference]: Finished difference Result 210 states and 528 transitions. [2021-01-06 22:53:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:32,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:32,304 INFO L225 Difference]: With dead ends: 210 [2021-01-06 22:53:32,304 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 22:53:32,304 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 22:53:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 22:53:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 158. [2021-01-06 22:53:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2021-01-06 22:53:32,309 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2021-01-06 22:53:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:32,309 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2021-01-06 22:53:32,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2021-01-06 22:53:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:32,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:32,310 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:32,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:32,525 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1951572218, now seen corresponding path program 52 times [2021-01-06 22:53:32,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:32,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65654820] [2021-01-06 22:53:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:32,611 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 22:53:32,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65654820] [2021-01-06 22:53:32,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699501938] [2021-01-06 22:53:32,612 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 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 22:53:32,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:32,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:32,787 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 22:53:32,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:32,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:32,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170369890] [2021-01-06 22:53:32,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:32,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:32,789 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 16 states. [2021-01-06 22:53:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:32,992 INFO L93 Difference]: Finished difference Result 208 states and 524 transitions. [2021-01-06 22:53:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:32,993 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:32,995 INFO L225 Difference]: With dead ends: 208 [2021-01-06 22:53:32,995 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 22:53:32,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 22:53:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 159. [2021-01-06 22:53:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2021-01-06 22:53:33,000 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2021-01-06 22:53:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:33,000 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2021-01-06 22:53:33,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2021-01-06 22:53:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:33,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:33,001 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:33,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:33,217 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1531586955, now seen corresponding path program 53 times [2021-01-06 22:53:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:33,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737345721] [2021-01-06 22:53:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:33,285 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 22:53:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737345721] [2021-01-06 22:53:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943198750] [2021-01-06 22:53:33,286 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 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 22:53:33,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:33,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:33,477 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 22:53:33,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:33,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:33,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551637952] [2021-01-06 22:53:33,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:33,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:33,480 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2021-01-06 22:53:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:33,691 INFO L93 Difference]: Finished difference Result 217 states and 541 transitions. [2021-01-06 22:53:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:33,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:33,694 INFO L225 Difference]: With dead ends: 217 [2021-01-06 22:53:33,694 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 22:53:33,694 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 22:53:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 22:53:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 159. [2021-01-06 22:53:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2021-01-06 22:53:33,699 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2021-01-06 22:53:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:33,699 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2021-01-06 22:53:33,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2021-01-06 22:53:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:33,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:33,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:33,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-06 22:53:33,915 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1531584072, now seen corresponding path program 54 times [2021-01-06 22:53:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555736496] [2021-01-06 22:53:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:33,990 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 22:53:33,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555736496] [2021-01-06 22:53:33,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808925203] [2021-01-06 22:53:33,991 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 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 22:53:34,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:34,182 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 22:53:34,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:34,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523235155] [2021-01-06 22:53:34,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:34,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:34,183 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2021-01-06 22:53:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:34,472 INFO L93 Difference]: Finished difference Result 227 states and 562 transitions. [2021-01-06 22:53:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:34,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:34,475 INFO L225 Difference]: With dead ends: 227 [2021-01-06 22:53:34,475 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 22:53:34,476 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 22:53:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 22:53:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2021-01-06 22:53:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 431 transitions. [2021-01-06 22:53:34,479 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 431 transitions. Word has length 13 [2021-01-06 22:53:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:34,479 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 431 transitions. [2021-01-06 22:53:34,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 431 transitions. [2021-01-06 22:53:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:34,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:34,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:34,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:34,681 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:34,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1531497582, now seen corresponding path program 55 times [2021-01-06 22:53:34,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:34,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311201199] [2021-01-06 22:53:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:34,761 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 22:53:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311201199] [2021-01-06 22:53:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21993618] [2021-01-06 22:53:34,761 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 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 22:53:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:34,930 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 22:53:34,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:34,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:34,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799060545] [2021-01-06 22:53:34,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:34,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:34,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:34,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:34,932 INFO L87 Difference]: Start difference. First operand 161 states and 431 transitions. Second operand 16 states. [2021-01-06 22:53:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:35,200 INFO L93 Difference]: Finished difference Result 221 states and 550 transitions. [2021-01-06 22:53:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:53:35,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:35,203 INFO L225 Difference]: With dead ends: 221 [2021-01-06 22:53:35,203 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 22:53:35,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 22:53:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-01-06 22:53:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2021-01-06 22:53:35,207 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2021-01-06 22:53:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:35,207 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2021-01-06 22:53:35,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2021-01-06 22:53:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:35,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:35,208 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:35,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:35,423 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash -949768725, now seen corresponding path program 56 times [2021-01-06 22:53:35,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:35,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280603657] [2021-01-06 22:53:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:35,489 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 22:53:35,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280603657] [2021-01-06 22:53:35,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920839438] [2021-01-06 22:53:35,490 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 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 22:53:35,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:35,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:35,704 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 22:53:35,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:35,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:35,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051946152] [2021-01-06 22:53:35,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:35,706 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2021-01-06 22:53:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:35,937 INFO L93 Difference]: Finished difference Result 215 states and 535 transitions. [2021-01-06 22:53:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:35,937 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:35,939 INFO L225 Difference]: With dead ends: 215 [2021-01-06 22:53:35,939 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:35,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:53:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2021-01-06 22:53:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2021-01-06 22:53:35,944 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2021-01-06 22:53:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2021-01-06 22:53:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2021-01-06 22:53:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:35,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:35,946 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:36,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 22:53:36,163 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash -949765842, now seen corresponding path program 57 times [2021-01-06 22:53:36,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:36,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391075491] [2021-01-06 22:53:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:36,247 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 22:53:36,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391075491] [2021-01-06 22:53:36,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868219109] [2021-01-06 22:53:36,248 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 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 22:53:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:36,437 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 22:53:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:36,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589214276] [2021-01-06 22:53:36,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:36,439 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2021-01-06 22:53:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:36,742 INFO L93 Difference]: Finished difference Result 230 states and 563 transitions. [2021-01-06 22:53:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:36,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:36,745 INFO L225 Difference]: With dead ends: 230 [2021-01-06 22:53:36,745 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 22:53:36,745 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 22:53:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 22:53:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 157. [2021-01-06 22:53:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2021-01-06 22:53:36,749 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2021-01-06 22:53:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:36,749 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2021-01-06 22:53:36,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2021-01-06 22:53:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:36,750 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:36,750 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:36,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:36,951 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash -949679352, now seen corresponding path program 58 times [2021-01-06 22:53:36,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:36,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156710402] [2021-01-06 22:53:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:37,042 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 22:53:37,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156710402] [2021-01-06 22:53:37,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881314163] [2021-01-06 22:53:37,043 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 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 22:53:37,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:37,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:37,230 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 22:53:37,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:37,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616948472] [2021-01-06 22:53:37,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:37,232 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2021-01-06 22:53:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:37,532 INFO L93 Difference]: Finished difference Result 228 states and 560 transitions. [2021-01-06 22:53:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:37,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:37,535 INFO L225 Difference]: With dead ends: 228 [2021-01-06 22:53:37,535 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 22:53:37,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:53:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 22:53:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2021-01-06 22:53:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 22:53:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2021-01-06 22:53:37,539 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2021-01-06 22:53:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:37,539 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2021-01-06 22:53:37,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2021-01-06 22:53:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:37,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:37,540 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:37,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 22:53:37,743 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -931000395, now seen corresponding path program 59 times [2021-01-06 22:53:37,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:37,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427947220] [2021-01-06 22:53:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:37,814 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 22:53:37,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427947220] [2021-01-06 22:53:37,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574001635] [2021-01-06 22:53:37,815 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 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 22:53:37,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:37,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:37,994 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 22:53:37,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:37,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:37,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879183355] [2021-01-06 22:53:37,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:37,995 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2021-01-06 22:53:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:38,250 INFO L93 Difference]: Finished difference Result 226 states and 552 transitions. [2021-01-06 22:53:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:53:38,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:38,252 INFO L225 Difference]: With dead ends: 226 [2021-01-06 22:53:38,252 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 22:53:38,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:53:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 22:53:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 155. [2021-01-06 22:53:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 22:53:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2021-01-06 22:53:38,257 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2021-01-06 22:53:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:38,258 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2021-01-06 22:53:38,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2021-01-06 22:53:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:38,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:38,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:38,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 22:53:38,473 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -930997512, now seen corresponding path program 60 times [2021-01-06 22:53:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:38,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136079533] [2021-01-06 22:53:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:38,548 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 22:53:38,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136079533] [2021-01-06 22:53:38,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554613139] [2021-01-06 22:53:38,549 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 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 22:53:38,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:38,759 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 22:53:38,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:38,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998840545] [2021-01-06 22:53:38,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:38,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:38,760 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2021-01-06 22:53:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:39,123 INFO L93 Difference]: Finished difference Result 240 states and 583 transitions. [2021-01-06 22:53:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:53:39,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:39,126 INFO L225 Difference]: With dead ends: 240 [2021-01-06 22:53:39,126 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 22:53:39,126 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 22:53:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 22:53:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2021-01-06 22:53:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 22:53:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 423 transitions. [2021-01-06 22:53:39,131 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 423 transitions. Word has length 13 [2021-01-06 22:53:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:39,131 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 423 transitions. [2021-01-06 22:53:39,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 423 transitions. [2021-01-06 22:53:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:39,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:39,132 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:39,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 22:53:39,340 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -930394965, now seen corresponding path program 61 times [2021-01-06 22:53:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645167935] [2021-01-06 22:53:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:39,410 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 22:53:39,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645167935] [2021-01-06 22:53:39,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269087667] [2021-01-06 22:53:39,411 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 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 22:53:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:39,612 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 22:53:39,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:39,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:39,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784529342] [2021-01-06 22:53:39,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:39,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:39,614 INFO L87 Difference]: Start difference. First operand 157 states and 423 transitions. Second operand 16 states. [2021-01-06 22:53:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:39,973 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2021-01-06 22:53:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:39,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:39,976 INFO L225 Difference]: With dead ends: 222 [2021-01-06 22:53:39,977 INFO L226 Difference]: Without dead ends: 220 [2021-01-06 22:53:39,977 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 22:53:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-01-06 22:53:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2021-01-06 22:53:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 430 transitions. [2021-01-06 22:53:39,982 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 430 transitions. Word has length 13 [2021-01-06 22:53:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:39,982 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 430 transitions. [2021-01-06 22:53:39,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 430 transitions. [2021-01-06 22:53:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:39,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:39,983 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:40,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:40,195 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:40,195 INFO L82 PathProgramCache]: Analyzing trace with hash -930375528, now seen corresponding path program 62 times [2021-01-06 22:53:40,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:40,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80319939] [2021-01-06 22:53:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:40,278 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 22:53:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80319939] [2021-01-06 22:53:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354139652] [2021-01-06 22:53:40,278 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 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 22:53:40,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:40,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:40,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:40,446 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 22:53:40,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:40,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:40,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412544476] [2021-01-06 22:53:40,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:40,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:40,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:40,448 INFO L87 Difference]: Start difference. First operand 159 states and 430 transitions. Second operand 16 states. [2021-01-06 22:53:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:40,878 INFO L93 Difference]: Finished difference Result 264 states and 639 transitions. [2021-01-06 22:53:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:40,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:40,881 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:53:40,881 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 22:53:40,882 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 22:53:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 22:53:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 159. [2021-01-06 22:53:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 427 transitions. [2021-01-06 22:53:40,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 427 transitions. Word has length 13 [2021-01-06 22:53:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:40,888 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 427 transitions. [2021-01-06 22:53:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 427 transitions. [2021-01-06 22:53:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:40,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:40,889 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:41,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:41,104 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash -930305592, now seen corresponding path program 63 times [2021-01-06 22:53:41,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:41,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226067534] [2021-01-06 22:53:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:41,188 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 22:53:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226067534] [2021-01-06 22:53:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811010653] [2021-01-06 22:53:41,188 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 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 22:53:41,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:53:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:41,363 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 22:53:41,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-01-06 22:53:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729668984] [2021-01-06 22:53:41,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:53:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:53:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:53:41,365 INFO L87 Difference]: Start difference. First operand 159 states and 427 transitions. Second operand 15 states. [2021-01-06 22:53:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:42,027 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2021-01-06 22:53:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:53:42,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2021-01-06 22:53:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:42,029 INFO L225 Difference]: With dead ends: 266 [2021-01-06 22:53:42,029 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:53:42,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:53:42,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:53:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 162. [2021-01-06 22:53:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 22:53:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 439 transitions. [2021-01-06 22:53:42,033 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 439 transitions. Word has length 13 [2021-01-06 22:53:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:42,034 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 439 transitions. [2021-01-06 22:53:42,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:53:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 439 transitions. [2021-01-06 22:53:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:42,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:42,035 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:42,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:42,250 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -930283272, now seen corresponding path program 64 times [2021-01-06 22:53:42,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:42,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407243946] [2021-01-06 22:53:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:42,347 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 22:53:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407243946] [2021-01-06 22:53:42,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964976570] [2021-01-06 22:53:42,348 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 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 22:53:42,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:42,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:42,526 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:42,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:42,549 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 22:53:42,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:42,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:42,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093143547] [2021-01-06 22:53:42,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:42,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:42,551 INFO L87 Difference]: Start difference. First operand 162 states and 439 transitions. Second operand 16 states. [2021-01-06 22:53:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:43,306 INFO L93 Difference]: Finished difference Result 303 states and 727 transitions. [2021-01-06 22:53:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:53:43,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:43,310 INFO L225 Difference]: With dead ends: 303 [2021-01-06 22:53:43,310 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 22:53:43,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:53:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 22:53:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 159. [2021-01-06 22:53:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 428 transitions. [2021-01-06 22:53:43,316 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 428 transitions. Word has length 13 [2021-01-06 22:53:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:43,316 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 428 transitions. [2021-01-06 22:53:43,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 428 transitions. [2021-01-06 22:53:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:43,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:43,317 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:43,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:43,522 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -928229832, now seen corresponding path program 65 times [2021-01-06 22:53:43,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:43,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150714737] [2021-01-06 22:53:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:43,604 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 22:53:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150714737] [2021-01-06 22:53:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455034744] [2021-01-06 22:53:43,605 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 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 22:53:43,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:43,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:43,776 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 22:53:43,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:43,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375757941] [2021-01-06 22:53:43,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:43,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:43,778 INFO L87 Difference]: Start difference. First operand 159 states and 428 transitions. Second operand 16 states. [2021-01-06 22:53:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:44,158 INFO L93 Difference]: Finished difference Result 246 states and 601 transitions. [2021-01-06 22:53:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:53:44,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:44,161 INFO L225 Difference]: With dead ends: 246 [2021-01-06 22:53:44,161 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 22:53:44,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 22:53:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2021-01-06 22:53:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 22:53:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 431 transitions. [2021-01-06 22:53:44,166 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 431 transitions. Word has length 13 [2021-01-06 22:53:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:44,166 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 431 transitions. [2021-01-06 22:53:44,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 431 transitions. [2021-01-06 22:53:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:44,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:44,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:44,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-06 22:53:44,370 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash -927624402, now seen corresponding path program 66 times [2021-01-06 22:53:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:44,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704859944] [2021-01-06 22:53:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:44,454 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 22:53:44,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704859944] [2021-01-06 22:53:44,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387499395] [2021-01-06 22:53:44,454 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 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 22:53:44,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:44,640 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 22:53:44,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:44,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:44,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877625830] [2021-01-06 22:53:44,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:44,642 INFO L87 Difference]: Start difference. First operand 159 states and 431 transitions. Second operand 16 states. [2021-01-06 22:53:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:45,122 INFO L93 Difference]: Finished difference Result 243 states and 596 transitions. [2021-01-06 22:53:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:45,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:45,124 INFO L225 Difference]: With dead ends: 243 [2021-01-06 22:53:45,124 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 22:53:45,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:53:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 22:53:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 161. [2021-01-06 22:53:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 22:53:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 438 transitions. [2021-01-06 22:53:45,129 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 438 transitions. Word has length 13 [2021-01-06 22:53:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:45,130 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 438 transitions. [2021-01-06 22:53:45,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 438 transitions. [2021-01-06 22:53:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:45,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:45,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:45,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:45,343 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:45,344 INFO L82 PathProgramCache]: Analyzing trace with hash -927604965, now seen corresponding path program 67 times [2021-01-06 22:53:45,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:45,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753112750] [2021-01-06 22:53:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:45,428 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 22:53:45,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753112750] [2021-01-06 22:53:45,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262447332] [2021-01-06 22:53:45,428 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 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 22:53:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:53:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:45,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:45,582 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 22:53:45,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:45,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-01-06 22:53:45,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781150569] [2021-01-06 22:53:45,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:53:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:53:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:53:45,585 INFO L87 Difference]: Start difference. First operand 161 states and 438 transitions. Second operand 16 states. [2021-01-06 22:53:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:46,261 INFO L93 Difference]: Finished difference Result 291 states and 706 transitions. [2021-01-06 22:53:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 22:53:46,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2021-01-06 22:53:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:46,264 INFO L225 Difference]: With dead ends: 291 [2021-01-06 22:53:46,264 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 22:53:46,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:53:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 22:53:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 158. [2021-01-06 22:53:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 426 transitions. [2021-01-06 22:53:46,270 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 426 transitions. Word has length 13 [2021-01-06 22:53:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:46,270 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 426 transitions. [2021-01-06 22:53:46,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:53:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 426 transitions. [2021-01-06 22:53:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:46,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:46,271 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:46,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:46,486 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -841628139, now seen corresponding path program 68 times [2021-01-06 22:53:46,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:46,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009369191] [2021-01-06 22:53:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:46,563 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 22:53:46,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009369191] [2021-01-06 22:53:46,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272709984] [2021-01-06 22:53:46,563 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 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 22:53:46,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:53:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:46,671 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 22:53:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:46,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 22:53:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577125050] [2021-01-06 22:53:46,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:53:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:53:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:53:46,673 INFO L87 Difference]: Start difference. First operand 158 states and 426 transitions. Second operand 12 states. [2021-01-06 22:53:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:46,888 INFO L93 Difference]: Finished difference Result 268 states and 657 transitions. [2021-01-06 22:53:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:46,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2021-01-06 22:53:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:46,891 INFO L225 Difference]: With dead ends: 268 [2021-01-06 22:53:46,891 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 22:53:46,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:53:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 22:53:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 158. [2021-01-06 22:53:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 22:53:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2021-01-06 22:53:46,896 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2021-01-06 22:53:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:46,896 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2021-01-06 22:53:46,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:53:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2021-01-06 22:53:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:46,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:46,897 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:47,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:47,098 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 864112436, now seen corresponding path program 15 times [2021-01-06 22:53:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:47,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197780614] [2021-01-06 22:53:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:47,204 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 22:53:47,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197780614] [2021-01-06 22:53:47,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964914445] [2021-01-06 22:53:47,205 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 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 22:53:47,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:53:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:47,418 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 22:53:47,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:47,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:47,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280556272] [2021-01-06 22:53:47,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:47,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:47,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:47,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:47,420 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 17 states. [2021-01-06 22:53:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:47,468 INFO L93 Difference]: Finished difference Result 203 states and 520 transitions. [2021-01-06 22:53:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:53:47,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:47,470 INFO L225 Difference]: With dead ends: 203 [2021-01-06 22:53:47,470 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 22:53:47,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 22:53:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-01-06 22:53:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 22:53:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 444 transitions. [2021-01-06 22:53:47,473 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 444 transitions. Word has length 13 [2021-01-06 22:53:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:47,473 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 444 transitions. [2021-01-06 22:53:47,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 444 transitions. [2021-01-06 22:53:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:47,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:47,474 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:47,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:47,685 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash 263131036, now seen corresponding path program 16 times [2021-01-06 22:53:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:47,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444379621] [2021-01-06 22:53:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:47,776 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 22:53:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444379621] [2021-01-06 22:53:47,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062661549] [2021-01-06 22:53:47,776 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 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 22:53:47,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:47,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:47,982 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 22:53:47,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:47,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:47,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145898009] [2021-01-06 22:53:47,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:47,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:47,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:47,984 INFO L87 Difference]: Start difference. First operand 167 states and 444 transitions. Second operand 17 states. [2021-01-06 22:53:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:48,070 INFO L93 Difference]: Finished difference Result 219 states and 550 transitions. [2021-01-06 22:53:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:53:48,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:48,072 INFO L225 Difference]: With dead ends: 219 [2021-01-06 22:53:48,072 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 22:53:48,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 22:53:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2021-01-06 22:53:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 22:53:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 441 transitions. [2021-01-06 22:53:48,076 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 441 transitions. Word has length 13 [2021-01-06 22:53:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:48,077 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 441 transitions. [2021-01-06 22:53:48,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 441 transitions. [2021-01-06 22:53:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:48,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:48,078 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:48,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 22:53:48,289 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -598716724, now seen corresponding path program 17 times [2021-01-06 22:53:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:48,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317990338] [2021-01-06 22:53:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:48,381 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 22:53:48,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317990338] [2021-01-06 22:53:48,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389360484] [2021-01-06 22:53:48,382 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 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 22:53:48,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:53:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:48,591 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 22:53:48,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137372892] [2021-01-06 22:53:48,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:48,593 INFO L87 Difference]: Start difference. First operand 166 states and 441 transitions. Second operand 17 states. [2021-01-06 22:53:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:48,686 INFO L93 Difference]: Finished difference Result 216 states and 542 transitions. [2021-01-06 22:53:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:53:48,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:48,688 INFO L225 Difference]: With dead ends: 216 [2021-01-06 22:53:48,689 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 22:53:48,689 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 22:53:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 22:53:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2021-01-06 22:53:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 22:53:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 438 transitions. [2021-01-06 22:53:48,694 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 438 transitions. Word has length 13 [2021-01-06 22:53:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:48,694 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 438 transitions. [2021-01-06 22:53:48,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 438 transitions. [2021-01-06 22:53:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:48,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:48,695 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:48,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-06 22:53:48,907 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 66218396, now seen corresponding path program 18 times [2021-01-06 22:53:48,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:48,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109182653] [2021-01-06 22:53:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:48,989 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 22:53:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109182653] [2021-01-06 22:53:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464558340] [2021-01-06 22:53:48,989 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 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 22:53:49,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:53:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:49,214 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 22:53:49,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:49,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:49,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178815288] [2021-01-06 22:53:49,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:49,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:49,216 INFO L87 Difference]: Start difference. First operand 165 states and 438 transitions. Second operand 17 states. [2021-01-06 22:53:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:49,348 INFO L93 Difference]: Finished difference Result 214 states and 535 transitions. [2021-01-06 22:53:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:53:49,349 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:49,351 INFO L225 Difference]: With dead ends: 214 [2021-01-06 22:53:49,351 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 22:53:49,351 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 22:53:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 22:53:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2021-01-06 22:53:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 22:53:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2021-01-06 22:53:49,358 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 13 [2021-01-06 22:53:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:49,359 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2021-01-06 22:53:49,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2021-01-06 22:53:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:49,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:49,360 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:49,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:49,572 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 87667916, now seen corresponding path program 19 times [2021-01-06 22:53:49,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:49,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115490536] [2021-01-06 22:53:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:49,652 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 22:53:49,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115490536] [2021-01-06 22:53:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712003801] [2021-01-06 22:53:49,653 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 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 22:53:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:49,863 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 22:53:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:49,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:49,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540574808] [2021-01-06 22:53:49,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:49,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:49,865 INFO L87 Difference]: Start difference. First operand 164 states and 435 transitions. Second operand 17 states. [2021-01-06 22:53:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:50,030 INFO L93 Difference]: Finished difference Result 213 states and 535 transitions. [2021-01-06 22:53:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:53:50,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:50,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:50,032 INFO L225 Difference]: With dead ends: 213 [2021-01-06 22:53:50,032 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 22:53:50,033 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 22:53:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 22:53:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-01-06 22:53:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 22:53:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 440 transitions. [2021-01-06 22:53:50,036 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 440 transitions. Word has length 13 [2021-01-06 22:53:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:50,036 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 440 transitions. [2021-01-06 22:53:50,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 440 transitions. [2021-01-06 22:53:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:50,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:50,037 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:50,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:50,238 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash 88359836, now seen corresponding path program 20 times [2021-01-06 22:53:50,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:50,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940180664] [2021-01-06 22:53:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:50,337 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 22:53:50,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940180664] [2021-01-06 22:53:50,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223413089] [2021-01-06 22:53:50,338 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 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 22:53:50,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:50,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:50,525 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 22:53:50,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:50,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:50,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592347845] [2021-01-06 22:53:50,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:50,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:50,527 INFO L87 Difference]: Start difference. First operand 165 states and 440 transitions. Second operand 17 states. [2021-01-06 22:53:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:50,726 INFO L93 Difference]: Finished difference Result 212 states and 535 transitions. [2021-01-06 22:53:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:50,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:50,728 INFO L225 Difference]: With dead ends: 212 [2021-01-06 22:53:50,728 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 22:53:50,728 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 22:53:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 22:53:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2021-01-06 22:53:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 22:53:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 447 transitions. [2021-01-06 22:53:50,732 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 447 transitions. Word has length 13 [2021-01-06 22:53:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:50,732 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 447 transitions. [2021-01-06 22:53:50,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 447 transitions. [2021-01-06 22:53:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:53:50,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:50,733 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:50,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:50,942 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:50,942 INFO L82 PathProgramCache]: Analyzing trace with hash 88382156, now seen corresponding path program 21 times [2021-01-06 22:53:50,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:50,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461089090] [2021-01-06 22:53:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:51,039 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 22:53:51,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461089090] [2021-01-06 22:53:51,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385807313] [2021-01-06 22:53:51,040 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 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 22:53:51,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:53:51,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:51,258 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 22:53:51,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:51,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177402081] [2021-01-06 22:53:51,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:51,259 INFO L87 Difference]: Start difference. First operand 167 states and 447 transitions. Second operand 17 states. [2021-01-06 22:53:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:51,467 INFO L93 Difference]: Finished difference Result 221 states and 559 transitions. [2021-01-06 22:53:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:53:51,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2021-01-06 22:53:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:51,470 INFO L225 Difference]: With dead ends: 221 [2021-01-06 22:53:51,470 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 22:53:51,470 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 22:53:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 22:53:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2021-01-06 22:53:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 22:53:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 443 transitions. [2021-01-06 22:53:51,474 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 443 transitions. Word has length 13 [2021-01-06 22:53:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:51,475 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 443 transitions. [2021-01-06 22:53:51,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 443 transitions. [2021-01-06 22:53:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:51,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:51,475 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:51,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:51,676 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 437714495, now seen corresponding path program 69 times [2021-01-06 22:53:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:51,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653172001] [2021-01-06 22:53:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:51,773 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 22:53:51,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653172001] [2021-01-06 22:53:51,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721364213] [2021-01-06 22:53:51,774 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 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 22:53:51,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:51,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:53:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:51,999 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 22:53:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:52,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:52,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462042844] [2021-01-06 22:53:52,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:52,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:52,001 INFO L87 Difference]: Start difference. First operand 164 states and 443 transitions. Second operand 17 states. [2021-01-06 22:53:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:52,179 INFO L93 Difference]: Finished difference Result 210 states and 527 transitions. [2021-01-06 22:53:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:53:52,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:52,182 INFO L225 Difference]: With dead ends: 210 [2021-01-06 22:53:52,182 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 22:53:52,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:53:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 22:53:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-01-06 22:53:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 22:53:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2021-01-06 22:53:52,187 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 14 [2021-01-06 22:53:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:52,188 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2021-01-06 22:53:52,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2021-01-06 22:53:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:52,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:52,188 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:52,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:52,395 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash 438082775, now seen corresponding path program 70 times [2021-01-06 22:53:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:52,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480439499] [2021-01-06 22:53:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:52,494 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 22:53:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480439499] [2021-01-06 22:53:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430615961] [2021-01-06 22:53:52,495 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 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 22:53:52,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:52,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:52,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:52,700 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:52,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:52,726 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 22:53:52,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:52,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:52,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198703621] [2021-01-06 22:53:52,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:52,729 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand 18 states. [2021-01-06 22:53:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:53,257 INFO L93 Difference]: Finished difference Result 285 states and 693 transitions. [2021-01-06 22:53:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:53:53,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:53,260 INFO L225 Difference]: With dead ends: 285 [2021-01-06 22:53:53,260 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 22:53:53,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:53:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 22:53:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2021-01-06 22:53:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 22:53:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 449 transitions. [2021-01-06 22:53:53,269 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 449 transitions. Word has length 14 [2021-01-06 22:53:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:53,269 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 449 transitions. [2021-01-06 22:53:53,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 449 transitions. [2021-01-06 22:53:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:53,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:53,270 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:53,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:53,484 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2124969700, now seen corresponding path program 71 times [2021-01-06 22:53:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:53,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646538526] [2021-01-06 22:53:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:53,569 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 22:53:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646538526] [2021-01-06 22:53:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566691394] [2021-01-06 22:53:53,570 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 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 22:53:53,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:53:53,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:53,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:53,849 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 22:53:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085638515] [2021-01-06 22:53:53,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:53,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:53,851 INFO L87 Difference]: Start difference. First operand 166 states and 449 transitions. Second operand 17 states. [2021-01-06 22:53:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:54,206 INFO L93 Difference]: Finished difference Result 241 states and 597 transitions. [2021-01-06 22:53:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:53:54,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:54,208 INFO L225 Difference]: With dead ends: 241 [2021-01-06 22:53:54,208 INFO L226 Difference]: Without dead ends: 239 [2021-01-06 22:53:54,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:53:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-01-06 22:53:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 170. [2021-01-06 22:53:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 22:53:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 455 transitions. [2021-01-06 22:53:54,212 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 455 transitions. Word has length 14 [2021-01-06 22:53:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:54,212 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 455 transitions. [2021-01-06 22:53:54,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 455 transitions. [2021-01-06 22:53:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:54,213 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:54,213 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:54,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:54,423 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:54,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1771052620, now seen corresponding path program 72 times [2021-01-06 22:53:54,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:54,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777940872] [2021-01-06 22:53:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:54,518 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 22:53:54,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777940872] [2021-01-06 22:53:54,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006409649] [2021-01-06 22:53:54,519 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 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 22:53:54,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:53:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:54,818 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 22:53:54,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:54,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:54,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126085655] [2021-01-06 22:53:54,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:54,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:54,819 INFO L87 Difference]: Start difference. First operand 170 states and 455 transitions. Second operand 17 states. [2021-01-06 22:53:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:55,240 INFO L93 Difference]: Finished difference Result 252 states and 619 transitions. [2021-01-06 22:53:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:53:55,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:55,244 INFO L225 Difference]: With dead ends: 252 [2021-01-06 22:53:55,244 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 22:53:55,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 22:53:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 172. [2021-01-06 22:53:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:53:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 462 transitions. [2021-01-06 22:53:55,249 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 462 transitions. Word has length 14 [2021-01-06 22:53:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:55,250 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 462 transitions. [2021-01-06 22:53:55,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 462 transitions. [2021-01-06 22:53:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:55,251 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:55,251 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:55,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-06 22:53:55,456 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:55,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1770447190, now seen corresponding path program 73 times [2021-01-06 22:53:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:55,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667858262] [2021-01-06 22:53:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:55,542 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 22:53:55,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667858262] [2021-01-06 22:53:55,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966396954] [2021-01-06 22:53:55,543 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 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 22:53:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:55,817 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 22:53:55,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:55,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790668233] [2021-01-06 22:53:55,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:55,818 INFO L87 Difference]: Start difference. First operand 172 states and 462 transitions. Second operand 17 states. [2021-01-06 22:53:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:56,329 INFO L93 Difference]: Finished difference Result 255 states and 633 transitions. [2021-01-06 22:53:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:53:56,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:56,331 INFO L225 Difference]: With dead ends: 255 [2021-01-06 22:53:56,332 INFO L226 Difference]: Without dead ends: 253 [2021-01-06 22:53:56,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:53:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-01-06 22:53:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 174. [2021-01-06 22:53:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:53:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 469 transitions. [2021-01-06 22:53:56,337 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 469 transitions. Word has length 14 [2021-01-06 22:53:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:56,337 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 469 transitions. [2021-01-06 22:53:56,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 469 transitions. [2021-01-06 22:53:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:56,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:56,338 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:56,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:56,553 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1770427753, now seen corresponding path program 74 times [2021-01-06 22:53:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:56,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721455272] [2021-01-06 22:53:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:56,650 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 22:53:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721455272] [2021-01-06 22:53:56,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580012798] [2021-01-06 22:53:56,651 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 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 22:53:56,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:53:56,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:56,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:56,863 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:56,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:53:56,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:56,882 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 22:53:56,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:56,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107210644] [2021-01-06 22:53:56,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:56,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:56,884 INFO L87 Difference]: Start difference. First operand 174 states and 469 transitions. Second operand 17 states. [2021-01-06 22:53:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:57,526 INFO L93 Difference]: Finished difference Result 265 states and 653 transitions. [2021-01-06 22:53:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:53:57,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:57,529 INFO L225 Difference]: With dead ends: 265 [2021-01-06 22:53:57,529 INFO L226 Difference]: Without dead ends: 257 [2021-01-06 22:53:57,529 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 22:53:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-01-06 22:53:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 175. [2021-01-06 22:53:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:53:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 474 transitions. [2021-01-06 22:53:57,535 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 474 transitions. Word has length 14 [2021-01-06 22:53:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:57,535 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 474 transitions. [2021-01-06 22:53:57,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 474 transitions. [2021-01-06 22:53:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:57,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:57,536 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:57,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-06 22:53:57,752 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1770424870, now seen corresponding path program 75 times [2021-01-06 22:53:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:57,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14741263] [2021-01-06 22:53:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:57,847 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 22:53:57,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14741263] [2021-01-06 22:53:57,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634642691] [2021-01-06 22:53:57,848 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 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 22:53:57,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:53:57,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:57,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:58,093 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:53:58,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:53:58,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:53:58,128 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 22:53:58,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:58,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:53:58,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230305099] [2021-01-06 22:53:58,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:53:58,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:53:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:53:58,130 INFO L87 Difference]: Start difference. First operand 175 states and 474 transitions. Second operand 18 states. [2021-01-06 22:53:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:58,926 INFO L93 Difference]: Finished difference Result 318 states and 777 transitions. [2021-01-06 22:53:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:53:58,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:53:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:58,929 INFO L225 Difference]: With dead ends: 318 [2021-01-06 22:53:58,929 INFO L226 Difference]: Without dead ends: 306 [2021-01-06 22:53:58,929 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 22:53:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-01-06 22:53:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2021-01-06 22:53:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 22:53:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2021-01-06 22:53:58,934 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2021-01-06 22:53:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:58,934 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2021-01-06 22:53:58,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:53:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2021-01-06 22:53:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:58,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:58,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:53:59,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:53:59,144 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:53:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:53:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2044516979, now seen corresponding path program 76 times [2021-01-06 22:53:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:53:59,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497859246] [2021-01-06 22:53:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:53:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:53:59,243 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 22:53:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497859246] [2021-01-06 22:53:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501966086] [2021-01-06 22:53:59,244 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 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 22:53:59,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:53:59,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:53:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:53:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:53:59,500 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 22:53:59,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:53:59,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:53:59,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352347912] [2021-01-06 22:53:59,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:53:59,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:53:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:53:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:53:59,501 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 17 states. [2021-01-06 22:53:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:53:59,909 INFO L93 Difference]: Finished difference Result 251 states and 623 transitions. [2021-01-06 22:53:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:53:59,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:53:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:53:59,911 INFO L225 Difference]: With dead ends: 251 [2021-01-06 22:53:59,911 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 22:53:59,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:53:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 22:53:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2021-01-06 22:53:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 22:53:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 466 transitions. [2021-01-06 22:53:59,917 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 466 transitions. Word has length 14 [2021-01-06 22:53:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:53:59,917 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 466 transitions. [2021-01-06 22:53:59,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:53:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 466 transitions. [2021-01-06 22:53:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:53:59,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:53:59,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:00,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 22:54:00,133 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash 336977909, now seen corresponding path program 77 times [2021-01-06 22:54:00,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:00,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876787630] [2021-01-06 22:54:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:00,222 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 22:54:00,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876787630] [2021-01-06 22:54:00,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604627995] [2021-01-06 22:54:00,223 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 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 22:54:00,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:00,478 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 22:54:00,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:00,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145988814] [2021-01-06 22:54:00,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:00,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:00,480 INFO L87 Difference]: Start difference. First operand 173 states and 466 transitions. Second operand 17 states. [2021-01-06 22:54:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:00,923 INFO L93 Difference]: Finished difference Result 252 states and 623 transitions. [2021-01-06 22:54:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:54:00,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:00,925 INFO L225 Difference]: With dead ends: 252 [2021-01-06 22:54:00,925 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 22:54:00,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 22:54:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 173. [2021-01-06 22:54:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 22:54:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 465 transitions. [2021-01-06 22:54:00,930 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 465 transitions. Word has length 14 [2021-01-06 22:54:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:00,931 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 465 transitions. [2021-01-06 22:54:00,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 465 transitions. [2021-01-06 22:54:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:00,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:00,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:01,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 22:54:01,132 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash 358427429, now seen corresponding path program 78 times [2021-01-06 22:54:01,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:01,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433153668] [2021-01-06 22:54:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:01,215 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 22:54:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433153668] [2021-01-06 22:54:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426734198] [2021-01-06 22:54:01,216 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 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 22:54:01,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:01,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:01,479 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 22:54:01,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:01,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245461387] [2021-01-06 22:54:01,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:01,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:01,481 INFO L87 Difference]: Start difference. First operand 173 states and 465 transitions. Second operand 17 states. [2021-01-06 22:54:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:02,050 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2021-01-06 22:54:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:02,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:02,052 INFO L225 Difference]: With dead ends: 271 [2021-01-06 22:54:02,052 INFO L226 Difference]: Without dead ends: 269 [2021-01-06 22:54:02,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:54:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-01-06 22:54:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 175. [2021-01-06 22:54:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2021-01-06 22:54:02,057 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 14 [2021-01-06 22:54:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:02,057 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2021-01-06 22:54:02,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2021-01-06 22:54:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:02,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:02,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:02,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-06 22:54:02,258 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 359032859, now seen corresponding path program 79 times [2021-01-06 22:54:02,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:02,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192705692] [2021-01-06 22:54:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:54:02,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192705692] [2021-01-06 22:54:02,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838483687] [2021-01-06 22:54:02,355 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 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 22:54:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:02,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:02,605 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 22:54:02,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:02,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:02,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477977967] [2021-01-06 22:54:02,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:02,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:02,607 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand 17 states. [2021-01-06 22:54:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:03,171 INFO L93 Difference]: Finished difference Result 269 states and 664 transitions. [2021-01-06 22:54:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:54:03,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:03,173 INFO L225 Difference]: With dead ends: 269 [2021-01-06 22:54:03,173 INFO L226 Difference]: Without dead ends: 267 [2021-01-06 22:54:03,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:54:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-01-06 22:54:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2021-01-06 22:54:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2021-01-06 22:54:03,176 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2021-01-06 22:54:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:03,177 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2021-01-06 22:54:03,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2021-01-06 22:54:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:03,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:03,177 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:03,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:03,378 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 359052296, now seen corresponding path program 80 times [2021-01-06 22:54:03,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:03,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854472742] [2021-01-06 22:54:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:03,472 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 22:54:03,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854472742] [2021-01-06 22:54:03,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268982129] [2021-01-06 22:54:03,473 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 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 22:54:03,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:03,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:03,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:03,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:03,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:03,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:03,710 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 22:54:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:03,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815427117] [2021-01-06 22:54:03,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:03,712 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2021-01-06 22:54:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:04,644 INFO L93 Difference]: Finished difference Result 286 states and 713 transitions. [2021-01-06 22:54:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:04,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:04,646 INFO L225 Difference]: With dead ends: 286 [2021-01-06 22:54:04,646 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 22:54:04,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:54:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 22:54:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2021-01-06 22:54:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 484 transitions. [2021-01-06 22:54:04,652 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 484 transitions. Word has length 14 [2021-01-06 22:54:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:04,652 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 484 transitions. [2021-01-06 22:54:04,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 484 transitions. [2021-01-06 22:54:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:04,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:04,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:04,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-06 22:54:04,862 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 359055179, now seen corresponding path program 81 times [2021-01-06 22:54:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:04,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637835993] [2021-01-06 22:54:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:04,963 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 22:54:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637835993] [2021-01-06 22:54:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864017974] [2021-01-06 22:54:04,963 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 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 22:54:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:05,216 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:05,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:54:05,221 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:54:05,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:05,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:05,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:05,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:05,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:05,285 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 22:54:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:05,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:05,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173592598] [2021-01-06 22:54:05,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:05,287 INFO L87 Difference]: Start difference. First operand 178 states and 484 transitions. Second operand 18 states. [2021-01-06 22:54:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:06,295 INFO L93 Difference]: Finished difference Result 329 states and 812 transitions. [2021-01-06 22:54:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:54:06,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:06,297 INFO L225 Difference]: With dead ends: 329 [2021-01-06 22:54:06,297 INFO L226 Difference]: Without dead ends: 317 [2021-01-06 22:54:06,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:54:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-01-06 22:54:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 170. [2021-01-06 22:54:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 22:54:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 465 transitions. [2021-01-06 22:54:06,302 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 465 transitions. Word has length 14 [2021-01-06 22:54:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:06,302 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 465 transitions. [2021-01-06 22:54:06,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 465 transitions. [2021-01-06 22:54:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:06,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:06,303 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:06,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:06,505 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash 446657436, now seen corresponding path program 82 times [2021-01-06 22:54:06,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:06,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688281448] [2021-01-06 22:54:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:06,604 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 22:54:06,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688281448] [2021-01-06 22:54:06,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51336524] [2021-01-06 22:54:06,605 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 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 22:54:06,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:06,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:06,826 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 22:54:06,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:06,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:06,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529799097] [2021-01-06 22:54:06,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:06,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:06,828 INFO L87 Difference]: Start difference. First operand 170 states and 465 transitions. Second operand 17 states. [2021-01-06 22:54:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:07,166 INFO L93 Difference]: Finished difference Result 244 states and 616 transitions. [2021-01-06 22:54:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:54:07,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:07,168 INFO L225 Difference]: With dead ends: 244 [2021-01-06 22:54:07,168 INFO L226 Difference]: Without dead ends: 242 [2021-01-06 22:54:07,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-01-06 22:54:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 171. [2021-01-06 22:54:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 22:54:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 468 transitions. [2021-01-06 22:54:07,175 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 468 transitions. Word has length 14 [2021-01-06 22:54:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:07,176 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 468 transitions. [2021-01-06 22:54:07,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 468 transitions. [2021-01-06 22:54:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:07,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:07,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:07,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-06 22:54:07,388 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 446660319, now seen corresponding path program 83 times [2021-01-06 22:54:07,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:07,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872658107] [2021-01-06 22:54:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:07,487 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 22:54:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872658107] [2021-01-06 22:54:07,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543707933] [2021-01-06 22:54:07,488 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 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 22:54:07,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:07,710 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 22:54:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:07,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:07,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674187835] [2021-01-06 22:54:07,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:07,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:07,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:07,712 INFO L87 Difference]: Start difference. First operand 171 states and 468 transitions. Second operand 17 states. [2021-01-06 22:54:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:08,111 INFO L93 Difference]: Finished difference Result 251 states and 630 transitions. [2021-01-06 22:54:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:54:08,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:08,113 INFO L225 Difference]: With dead ends: 251 [2021-01-06 22:54:08,113 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 22:54:08,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 22:54:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 172. [2021-01-06 22:54:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:54:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 471 transitions. [2021-01-06 22:54:08,116 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 471 transitions. Word has length 14 [2021-01-06 22:54:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:08,117 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 471 transitions. [2021-01-06 22:54:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 471 transitions. [2021-01-06 22:54:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:08,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:08,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:08,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:08,318 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 446746809, now seen corresponding path program 84 times [2021-01-06 22:54:08,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:08,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676469987] [2021-01-06 22:54:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:08,415 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 22:54:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676469987] [2021-01-06 22:54:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654431427] [2021-01-06 22:54:08,416 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 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 22:54:08,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:08,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:08,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:08,627 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 22:54:08,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:08,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574827664] [2021-01-06 22:54:08,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:08,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:08,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:08,628 INFO L87 Difference]: Start difference. First operand 172 states and 471 transitions. Second operand 17 states. [2021-01-06 22:54:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:08,964 INFO L93 Difference]: Finished difference Result 251 states and 628 transitions. [2021-01-06 22:54:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:54:08,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:08,966 INFO L225 Difference]: With dead ends: 251 [2021-01-06 22:54:08,966 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 22:54:08,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 22:54:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2021-01-06 22:54:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 22:54:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 474 transitions. [2021-01-06 22:54:08,970 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 474 transitions. Word has length 14 [2021-01-06 22:54:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:08,970 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 474 transitions. [2021-01-06 22:54:08,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 474 transitions. [2021-01-06 22:54:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:08,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:08,971 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:09,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:09,183 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 449520255, now seen corresponding path program 85 times [2021-01-06 22:54:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:09,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921360333] [2021-01-06 22:54:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:09,292 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 22:54:09,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921360333] [2021-01-06 22:54:09,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119017806] [2021-01-06 22:54:09,292 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 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 22:54:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:09,499 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 22:54:09,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:09,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:09,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109428732] [2021-01-06 22:54:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:09,501 INFO L87 Difference]: Start difference. First operand 173 states and 474 transitions. Second operand 17 states. [2021-01-06 22:54:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:09,799 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2021-01-06 22:54:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:09,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:09,800 INFO L225 Difference]: With dead ends: 242 [2021-01-06 22:54:09,801 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 22:54:09,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:54:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 22:54:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 177. [2021-01-06 22:54:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2021-01-06 22:54:09,804 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2021-01-06 22:54:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:09,804 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2021-01-06 22:54:09,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2021-01-06 22:54:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:09,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:09,805 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:10,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-06 22:54:10,007 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1258554932, now seen corresponding path program 86 times [2021-01-06 22:54:10,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:10,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223318336] [2021-01-06 22:54:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:10,098 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 22:54:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223318336] [2021-01-06 22:54:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029586247] [2021-01-06 22:54:10,099 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 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 22:54:10,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:10,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:10,311 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 22:54:10,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:10,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:10,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747973465] [2021-01-06 22:54:10,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:10,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:10,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:10,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:10,313 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2021-01-06 22:54:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:10,701 INFO L93 Difference]: Finished difference Result 264 states and 654 transitions. [2021-01-06 22:54:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:10,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:10,704 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:54:10,704 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:54:10,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:54:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2021-01-06 22:54:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2021-01-06 22:54:10,707 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2021-01-06 22:54:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:10,707 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2021-01-06 22:54:10,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2021-01-06 22:54:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:10,708 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:10,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:10,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-06 22:54:10,909 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1258557815, now seen corresponding path program 87 times [2021-01-06 22:54:10,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:10,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827361290] [2021-01-06 22:54:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:11,004 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 22:54:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827361290] [2021-01-06 22:54:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120261371] [2021-01-06 22:54:11,004 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 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 22:54:11,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:54:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:11,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:11,219 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 22:54:11,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:11,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:11,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870721971] [2021-01-06 22:54:11,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:11,221 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2021-01-06 22:54:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:11,637 INFO L93 Difference]: Finished difference Result 268 states and 663 transitions. [2021-01-06 22:54:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:11,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:11,639 INFO L225 Difference]: With dead ends: 268 [2021-01-06 22:54:11,639 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 22:54:11,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 22:54:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 178. [2021-01-06 22:54:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2021-01-06 22:54:11,643 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2021-01-06 22:54:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:11,644 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2021-01-06 22:54:11,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2021-01-06 22:54:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:11,644 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:11,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:11,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:11,845 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:11,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1258644305, now seen corresponding path program 88 times [2021-01-06 22:54:11,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:11,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476844480] [2021-01-06 22:54:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:11,939 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 22:54:11,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476844480] [2021-01-06 22:54:11,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125910745] [2021-01-06 22:54:11,940 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 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 22:54:11,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:11,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:12,136 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 22:54:12,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:12,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:12,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152299202] [2021-01-06 22:54:12,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:12,138 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2021-01-06 22:54:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:12,498 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2021-01-06 22:54:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:12,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:12,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:12,500 INFO L225 Difference]: With dead ends: 262 [2021-01-06 22:54:12,500 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 22:54:12,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:54:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 22:54:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 178. [2021-01-06 22:54:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2021-01-06 22:54:12,504 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2021-01-06 22:54:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:12,504 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2021-01-06 22:54:12,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2021-01-06 22:54:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:12,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:12,505 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:12,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-06 22:54:12,705 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1261417751, now seen corresponding path program 89 times [2021-01-06 22:54:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:12,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275764702] [2021-01-06 22:54:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:12,798 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 22:54:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275764702] [2021-01-06 22:54:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967708480] [2021-01-06 22:54:12,798 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 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 22:54:12,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:13,018 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 22:54:13,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:13,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066954667] [2021-01-06 22:54:13,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:13,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:13,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:13,020 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2021-01-06 22:54:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:13,304 INFO L93 Difference]: Finished difference Result 248 states and 621 transitions. [2021-01-06 22:54:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:13,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:13,305 INFO L225 Difference]: With dead ends: 248 [2021-01-06 22:54:13,305 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 22:54:13,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 22:54:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2021-01-06 22:54:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2021-01-06 22:54:13,310 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2021-01-06 22:54:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:13,310 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2021-01-06 22:54:13,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2021-01-06 22:54:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:13,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:13,311 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:13,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-06 22:54:13,520 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:13,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1840373162, now seen corresponding path program 90 times [2021-01-06 22:54:13,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:13,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94656049] [2021-01-06 22:54:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:13,613 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 22:54:13,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94656049] [2021-01-06 22:54:13,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735794576] [2021-01-06 22:54:13,614 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 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 22:54:13,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:13,825 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 22:54:13,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:13,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789089468] [2021-01-06 22:54:13,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:13,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:13,827 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2021-01-06 22:54:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:14,366 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2021-01-06 22:54:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:14,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:14,368 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:54:14,368 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 22:54:14,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 22:54:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 176. [2021-01-06 22:54:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2021-01-06 22:54:14,372 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2021-01-06 22:54:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:14,372 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2021-01-06 22:54:14,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2021-01-06 22:54:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:14,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:14,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:14,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-01-06 22:54:14,573 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1840376045, now seen corresponding path program 91 times [2021-01-06 22:54:14,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:14,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890304454] [2021-01-06 22:54:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:14,667 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 22:54:14,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890304454] [2021-01-06 22:54:14,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120165381] [2021-01-06 22:54:14,668 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 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 22:54:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:14,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:14,886 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 22:54:14,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:14,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:14,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022777971] [2021-01-06 22:54:14,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:14,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:14,888 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 17 states. [2021-01-06 22:54:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:15,456 INFO L93 Difference]: Finished difference Result 269 states and 659 transitions. [2021-01-06 22:54:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:15,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:15,458 INFO L225 Difference]: With dead ends: 269 [2021-01-06 22:54:15,458 INFO L226 Difference]: Without dead ends: 267 [2021-01-06 22:54:15,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:54:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-01-06 22:54:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2021-01-06 22:54:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2021-01-06 22:54:15,462 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2021-01-06 22:54:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:15,462 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2021-01-06 22:54:15,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2021-01-06 22:54:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:15,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:15,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:15,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:15,663 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1840462535, now seen corresponding path program 92 times [2021-01-06 22:54:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:15,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589891201] [2021-01-06 22:54:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:15,754 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 22:54:15,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589891201] [2021-01-06 22:54:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305623936] [2021-01-06 22:54:15,755 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 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 22:54:15,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:15,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:15,954 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 22:54:15,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:15,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889828444] [2021-01-06 22:54:15,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:15,955 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2021-01-06 22:54:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:16,389 INFO L93 Difference]: Finished difference Result 262 states and 644 transitions. [2021-01-06 22:54:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:16,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:16,391 INFO L225 Difference]: With dead ends: 262 [2021-01-06 22:54:16,391 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 22:54:16,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:54:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 22:54:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 176. [2021-01-06 22:54:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:54:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2021-01-06 22:54:16,397 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2021-01-06 22:54:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:16,397 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2021-01-06 22:54:16,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2021-01-06 22:54:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:16,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:16,398 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:16,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-01-06 22:54:16,599 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1859141492, now seen corresponding path program 93 times [2021-01-06 22:54:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:16,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025095085] [2021-01-06 22:54:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:16,688 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 22:54:16,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025095085] [2021-01-06 22:54:16,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566385383] [2021-01-06 22:54:16,689 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 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 22:54:16,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:16,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:54:16,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:16,890 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 22:54:16,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:16,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 22:54:16,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765302874] [2021-01-06 22:54:16,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:54:16,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:54:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:54:16,893 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 16 states. [2021-01-06 22:54:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:17,411 INFO L93 Difference]: Finished difference Result 268 states and 659 transitions. [2021-01-06 22:54:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:17,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2021-01-06 22:54:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:17,413 INFO L225 Difference]: With dead ends: 268 [2021-01-06 22:54:17,413 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 22:54:17,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 22:54:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 177. [2021-01-06 22:54:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2021-01-06 22:54:17,417 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2021-01-06 22:54:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:17,417 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2021-01-06 22:54:17,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:54:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2021-01-06 22:54:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:17,417 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:17,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:17,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-01-06 22:54:17,619 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:17,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1859144375, now seen corresponding path program 94 times [2021-01-06 22:54:17,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:17,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630157447] [2021-01-06 22:54:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:17,716 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 22:54:17,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630157447] [2021-01-06 22:54:17,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305991305] [2021-01-06 22:54:17,717 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 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 22:54:17,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:17,934 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 22:54:17,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:17,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:17,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138590896] [2021-01-06 22:54:17,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:17,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:17,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:17,936 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2021-01-06 22:54:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:18,640 INFO L93 Difference]: Finished difference Result 274 states and 670 transitions. [2021-01-06 22:54:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:18,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:18,642 INFO L225 Difference]: With dead ends: 274 [2021-01-06 22:54:18,642 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 22:54:18,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:54:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 22:54:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 178. [2021-01-06 22:54:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2021-01-06 22:54:18,647 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2021-01-06 22:54:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:18,647 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2021-01-06 22:54:18,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2021-01-06 22:54:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:18,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:18,647 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:18,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:18,848 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1859746922, now seen corresponding path program 95 times [2021-01-06 22:54:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:18,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005964084] [2021-01-06 22:54:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:18,956 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 22:54:18,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005964084] [2021-01-06 22:54:18,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737194485] [2021-01-06 22:54:18,957 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 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 22:54:19,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:19,210 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 22:54:19,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:19,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:19,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294139571] [2021-01-06 22:54:19,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:19,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:19,212 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2021-01-06 22:54:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:19,918 INFO L93 Difference]: Finished difference Result 265 states and 661 transitions. [2021-01-06 22:54:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:19,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:19,920 INFO L225 Difference]: With dead ends: 265 [2021-01-06 22:54:19,920 INFO L226 Difference]: Without dead ends: 263 [2021-01-06 22:54:19,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-01-06 22:54:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 180. [2021-01-06 22:54:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2021-01-06 22:54:19,925 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2021-01-06 22:54:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:19,926 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2021-01-06 22:54:19,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2021-01-06 22:54:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:19,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:19,926 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:20,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:20,127 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1859766359, now seen corresponding path program 96 times [2021-01-06 22:54:20,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:20,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498124552] [2021-01-06 22:54:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:20,233 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 22:54:20,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498124552] [2021-01-06 22:54:20,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000463864] [2021-01-06 22:54:20,234 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 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 22:54:20,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:20,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:20,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:20,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:20,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:20,477 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 22:54:20,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:20,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:20,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911377913] [2021-01-06 22:54:20,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:20,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:20,479 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 17 states. [2021-01-06 22:54:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:21,202 INFO L93 Difference]: Finished difference Result 263 states and 658 transitions. [2021-01-06 22:54:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:21,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:21,204 INFO L225 Difference]: With dead ends: 263 [2021-01-06 22:54:21,204 INFO L226 Difference]: Without dead ends: 255 [2021-01-06 22:54:21,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:54:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-01-06 22:54:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2021-01-06 22:54:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2021-01-06 22:54:21,209 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2021-01-06 22:54:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:21,209 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2021-01-06 22:54:21,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2021-01-06 22:54:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:21,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:21,210 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:21,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:21,411 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1859769242, now seen corresponding path program 97 times [2021-01-06 22:54:21,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:21,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320380474] [2021-01-06 22:54:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:21,527 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 22:54:21,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320380474] [2021-01-06 22:54:21,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559008929] [2021-01-06 22:54:21,528 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 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 22:54:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:21,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:21,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:21,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:21,777 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 22:54:21,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:21,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:21,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035827069] [2021-01-06 22:54:21,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:21,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:21,779 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 18 states. [2021-01-06 22:54:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:22,913 INFO L93 Difference]: Finished difference Result 332 states and 817 transitions. [2021-01-06 22:54:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:54:22,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:22,915 INFO L225 Difference]: With dead ends: 332 [2021-01-06 22:54:22,916 INFO L226 Difference]: Without dead ends: 320 [2021-01-06 22:54:22,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-01-06 22:54:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 177. [2021-01-06 22:54:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2021-01-06 22:54:22,922 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2021-01-06 22:54:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:22,922 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2021-01-06 22:54:22,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2021-01-06 22:54:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:22,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:22,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:23,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:23,138 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:23,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1861912055, now seen corresponding path program 98 times [2021-01-06 22:54:23,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:23,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793543461] [2021-01-06 22:54:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:23,240 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 22:54:23,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793543461] [2021-01-06 22:54:23,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728808281] [2021-01-06 22:54:23,241 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 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 22:54:23,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:23,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:23,452 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 22:54:23,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:23,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137718586] [2021-01-06 22:54:23,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:23,454 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2021-01-06 22:54:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:24,144 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2021-01-06 22:54:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:24,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:24,146 INFO L225 Difference]: With dead ends: 271 [2021-01-06 22:54:24,146 INFO L226 Difference]: Without dead ends: 269 [2021-01-06 22:54:24,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 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 22:54:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-01-06 22:54:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 179. [2021-01-06 22:54:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 487 transitions. [2021-01-06 22:54:24,150 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 487 transitions. Word has length 14 [2021-01-06 22:54:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:24,150 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 487 transitions. [2021-01-06 22:54:24,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 487 transitions. [2021-01-06 22:54:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:24,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:24,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:24,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-01-06 22:54:24,351 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1862517485, now seen corresponding path program 99 times [2021-01-06 22:54:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:24,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769736607] [2021-01-06 22:54:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:24,461 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 22:54:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769736607] [2021-01-06 22:54:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912257544] [2021-01-06 22:54:24,462 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 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 22:54:24,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:24,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:24,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:24,712 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 22:54:24,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:24,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672073765] [2021-01-06 22:54:24,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:24,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:24,714 INFO L87 Difference]: Start difference. First operand 179 states and 487 transitions. Second operand 17 states. [2021-01-06 22:54:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:25,521 INFO L93 Difference]: Finished difference Result 282 states and 693 transitions. [2021-01-06 22:54:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:25,522 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:25,523 INFO L225 Difference]: With dead ends: 282 [2021-01-06 22:54:25,523 INFO L226 Difference]: Without dead ends: 280 [2021-01-06 22:54:25,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-01-06 22:54:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 181. [2021-01-06 22:54:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 494 transitions. [2021-01-06 22:54:25,527 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 494 transitions. Word has length 14 [2021-01-06 22:54:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:25,527 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 494 transitions. [2021-01-06 22:54:25,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 494 transitions. [2021-01-06 22:54:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:25,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:25,528 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:25,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-01-06 22:54:25,730 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1862536922, now seen corresponding path program 100 times [2021-01-06 22:54:25,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:25,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160571695] [2021-01-06 22:54:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:25,842 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 22:54:25,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160571695] [2021-01-06 22:54:25,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171307801] [2021-01-06 22:54:25,843 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 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 22:54:25,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:26,050 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:26,063 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 22:54:26,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:26,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:26,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056038067] [2021-01-06 22:54:26,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:26,065 INFO L87 Difference]: Start difference. First operand 181 states and 494 transitions. Second operand 17 states. [2021-01-06 22:54:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:27,040 INFO L93 Difference]: Finished difference Result 304 states and 753 transitions. [2021-01-06 22:54:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 22:54:27,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:27,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:27,042 INFO L225 Difference]: With dead ends: 304 [2021-01-06 22:54:27,042 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 22:54:27,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 22:54:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2021-01-06 22:54:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 499 transitions. [2021-01-06 22:54:27,047 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 499 transitions. Word has length 14 [2021-01-06 22:54:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:27,047 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 499 transitions. [2021-01-06 22:54:27,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 499 transitions. [2021-01-06 22:54:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:27,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:27,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:27,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-01-06 22:54:27,248 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1862539805, now seen corresponding path program 101 times [2021-01-06 22:54:27,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:27,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953144651] [2021-01-06 22:54:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:27,362 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 22:54:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953144651] [2021-01-06 22:54:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269524045] [2021-01-06 22:54:27,362 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 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 22:54:27,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:27,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:27,596 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 22:54:27,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:27,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645633332] [2021-01-06 22:54:27,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:27,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:27,597 INFO L87 Difference]: Start difference. First operand 182 states and 499 transitions. Second operand 18 states. [2021-01-06 22:54:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:28,602 INFO L93 Difference]: Finished difference Result 330 states and 814 transitions. [2021-01-06 22:54:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:54:28,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:28,604 INFO L225 Difference]: With dead ends: 330 [2021-01-06 22:54:28,605 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 22:54:28,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 22:54:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 175. [2021-01-06 22:54:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 469 transitions. [2021-01-06 22:54:28,608 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 469 transitions. Word has length 14 [2021-01-06 22:54:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:28,609 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 469 transitions. [2021-01-06 22:54:28,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 469 transitions. [2021-01-06 22:54:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:28,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:28,609 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:28,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:28,811 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1926352871, now seen corresponding path program 102 times [2021-01-06 22:54:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:28,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356101766] [2021-01-06 22:54:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:28,921 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 22:54:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356101766] [2021-01-06 22:54:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709830405] [2021-01-06 22:54:28,922 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 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 22:54:28,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:54:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:29,151 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 22:54:29,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036678079] [2021-01-06 22:54:29,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:29,154 INFO L87 Difference]: Start difference. First operand 175 states and 469 transitions. Second operand 17 states. [2021-01-06 22:54:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:29,600 INFO L93 Difference]: Finished difference Result 253 states and 624 transitions. [2021-01-06 22:54:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:29,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:29,602 INFO L225 Difference]: With dead ends: 253 [2021-01-06 22:54:29,603 INFO L226 Difference]: Without dead ends: 251 [2021-01-06 22:54:29,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-01-06 22:54:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2021-01-06 22:54:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 468 transitions. [2021-01-06 22:54:29,607 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 468 transitions. Word has length 14 [2021-01-06 22:54:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:29,608 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 468 transitions. [2021-01-06 22:54:29,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 468 transitions. [2021-01-06 22:54:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:29,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:29,608 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:29,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-01-06 22:54:29,812 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1947802391, now seen corresponding path program 103 times [2021-01-06 22:54:29,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:29,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036109484] [2021-01-06 22:54:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:29,917 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 22:54:29,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036109484] [2021-01-06 22:54:29,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853904153] [2021-01-06 22:54:29,918 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 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 22:54:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:30,143 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 22:54:30,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:30,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:30,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657389658] [2021-01-06 22:54:30,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:30,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:30,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:30,146 INFO L87 Difference]: Start difference. First operand 175 states and 468 transitions. Second operand 17 states. [2021-01-06 22:54:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:30,714 INFO L93 Difference]: Finished difference Result 252 states and 616 transitions. [2021-01-06 22:54:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:54:30,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:30,716 INFO L225 Difference]: With dead ends: 252 [2021-01-06 22:54:30,716 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 22:54:30,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 22:54:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 175. [2021-01-06 22:54:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:54:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 467 transitions. [2021-01-06 22:54:30,721 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 467 transitions. Word has length 14 [2021-01-06 22:54:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:30,721 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 467 transitions. [2021-01-06 22:54:30,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 467 transitions. [2021-01-06 22:54:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:30,722 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:30,722 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:30,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:30,936 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1948494311, now seen corresponding path program 104 times [2021-01-06 22:54:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087098211] [2021-01-06 22:54:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:31,040 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 22:54:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087098211] [2021-01-06 22:54:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782078738] [2021-01-06 22:54:31,041 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 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 22:54:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:31,265 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 22:54:31,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:31,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204876166] [2021-01-06 22:54:31,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:31,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:31,267 INFO L87 Difference]: Start difference. First operand 175 states and 467 transitions. Second operand 17 states. [2021-01-06 22:54:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:31,819 INFO L93 Difference]: Finished difference Result 247 states and 611 transitions. [2021-01-06 22:54:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:54:31,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:31,821 INFO L225 Difference]: With dead ends: 247 [2021-01-06 22:54:31,821 INFO L226 Difference]: Without dead ends: 245 [2021-01-06 22:54:31,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-01-06 22:54:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 177. [2021-01-06 22:54:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2021-01-06 22:54:31,827 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2021-01-06 22:54:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:31,827 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2021-01-06 22:54:31,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2021-01-06 22:54:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:31,828 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:31,828 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:32,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-01-06 22:54:32,043 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:32,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1948513748, now seen corresponding path program 105 times [2021-01-06 22:54:32,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:32,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040978197] [2021-01-06 22:54:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:32,156 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 22:54:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040978197] [2021-01-06 22:54:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011807255] [2021-01-06 22:54:32,157 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 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 22:54:32,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:54:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:54:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:32,337 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 22:54:32,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:32,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:32,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241492316] [2021-01-06 22:54:32,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:32,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:32,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:32,339 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 17 states. [2021-01-06 22:54:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:33,382 INFO L93 Difference]: Finished difference Result 330 states and 792 transitions. [2021-01-06 22:54:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 22:54:33,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:33,384 INFO L225 Difference]: With dead ends: 330 [2021-01-06 22:54:33,384 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 22:54:33,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:54:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 22:54:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 174. [2021-01-06 22:54:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:54:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2021-01-06 22:54:33,388 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2021-01-06 22:54:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:33,388 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2021-01-06 22:54:33,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2021-01-06 22:54:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:33,388 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:33,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:33,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:33,589 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash 366512909, now seen corresponding path program 106 times [2021-01-06 22:54:33,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:33,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810634056] [2021-01-06 22:54:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:33,699 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 22:54:33,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810634056] [2021-01-06 22:54:33,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217459293] [2021-01-06 22:54:33,700 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 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 22:54:33,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:33,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:33,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:33,941 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 22:54:33,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:33,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:33,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327039859] [2021-01-06 22:54:33,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:33,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:33,943 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 17 states. [2021-01-06 22:54:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:34,342 INFO L93 Difference]: Finished difference Result 247 states and 621 transitions. [2021-01-06 22:54:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:54:34,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:34,344 INFO L225 Difference]: With dead ends: 247 [2021-01-06 22:54:34,344 INFO L226 Difference]: Without dead ends: 245 [2021-01-06 22:54:34,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:54:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-01-06 22:54:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 181. [2021-01-06 22:54:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 489 transitions. [2021-01-06 22:54:34,349 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 489 transitions. Word has length 14 [2021-01-06 22:54:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:34,350 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 489 transitions. [2021-01-06 22:54:34,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 489 transitions. [2021-01-06 22:54:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:34,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:34,350 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:34,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-01-06 22:54:34,555 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 369286355, now seen corresponding path program 107 times [2021-01-06 22:54:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:34,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338470569] [2021-01-06 22:54:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:34,665 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 22:54:34,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338470569] [2021-01-06 22:54:34,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429428129] [2021-01-06 22:54:34,665 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 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 22:54:34,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:34,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:34,896 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 22:54:34,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836655678] [2021-01-06 22:54:34,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:34,898 INFO L87 Difference]: Start difference. First operand 181 states and 489 transitions. Second operand 17 states. [2021-01-06 22:54:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:35,256 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2021-01-06 22:54:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:54:35,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:35,258 INFO L225 Difference]: With dead ends: 242 [2021-01-06 22:54:35,258 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 22:54:35,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 22:54:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-01-06 22:54:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 486 transitions. [2021-01-06 22:54:35,263 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 486 transitions. Word has length 14 [2021-01-06 22:54:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:35,263 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 486 transitions. [2021-01-06 22:54:35,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 486 transitions. [2021-01-06 22:54:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:35,264 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:35,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:35,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:35,474 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 452310989, now seen corresponding path program 108 times [2021-01-06 22:54:35,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:35,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972750459] [2021-01-06 22:54:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:35,582 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 22:54:35,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972750459] [2021-01-06 22:54:35,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020392706] [2021-01-06 22:54:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:54:35,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:35,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:35,832 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 22:54:35,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:35,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820380914] [2021-01-06 22:54:35,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:35,834 INFO L87 Difference]: Start difference. First operand 180 states and 486 transitions. Second operand 17 states. [2021-01-06 22:54:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:36,163 INFO L93 Difference]: Finished difference Result 239 states and 605 transitions. [2021-01-06 22:54:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:54:36,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:36,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:36,170 INFO L225 Difference]: With dead ends: 239 [2021-01-06 22:54:36,170 INFO L226 Difference]: Without dead ends: 237 [2021-01-06 22:54:36,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:54:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-01-06 22:54:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2021-01-06 22:54:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 22:54:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 494 transitions. [2021-01-06 22:54:36,174 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 494 transitions. Word has length 14 [2021-01-06 22:54:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:36,174 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 494 transitions. [2021-01-06 22:54:36,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 494 transitions. [2021-01-06 22:54:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:36,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:36,174 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:36,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-01-06 22:54:36,375 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 452313872, now seen corresponding path program 109 times [2021-01-06 22:54:36,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:36,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482804904] [2021-01-06 22:54:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:36,492 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 22:54:36,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482804904] [2021-01-06 22:54:36,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399501649] [2021-01-06 22:54:36,493 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 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 22:54:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:36,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:36,754 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 22:54:36,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:36,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:36,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492887628] [2021-01-06 22:54:36,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:36,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:36,757 INFO L87 Difference]: Start difference. First operand 183 states and 494 transitions. Second operand 17 states. [2021-01-06 22:54:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:37,120 INFO L93 Difference]: Finished difference Result 246 states and 619 transitions. [2021-01-06 22:54:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:54:37,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:37,122 INFO L225 Difference]: With dead ends: 246 [2021-01-06 22:54:37,123 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 22:54:37,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:54:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 22:54:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 180. [2021-01-06 22:54:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 485 transitions. [2021-01-06 22:54:37,126 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 485 transitions. Word has length 14 [2021-01-06 22:54:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:37,126 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 485 transitions. [2021-01-06 22:54:37,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 485 transitions. [2021-01-06 22:54:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:37,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:37,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:37,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-01-06 22:54:37,327 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash -234468491, now seen corresponding path program 110 times [2021-01-06 22:54:37,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:37,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225733098] [2021-01-06 22:54:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:37,425 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 22:54:37,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225733098] [2021-01-06 22:54:37,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071603183] [2021-01-06 22:54:37,426 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 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 22:54:37,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:37,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:37,675 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 22:54:37,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:37,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:37,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83955041] [2021-01-06 22:54:37,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:37,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:37,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:37,677 INFO L87 Difference]: Start difference. First operand 180 states and 485 transitions. Second operand 17 states. [2021-01-06 22:54:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:38,215 INFO L93 Difference]: Finished difference Result 265 states and 658 transitions. [2021-01-06 22:54:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:54:38,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:38,218 INFO L225 Difference]: With dead ends: 265 [2021-01-06 22:54:38,218 INFO L226 Difference]: Without dead ends: 263 [2021-01-06 22:54:38,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-01-06 22:54:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 184. [2021-01-06 22:54:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:54:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2021-01-06 22:54:38,221 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2021-01-06 22:54:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:38,221 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2021-01-06 22:54:38,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2021-01-06 22:54:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:38,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:38,222 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:38,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-01-06 22:54:38,434 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash -231695045, now seen corresponding path program 111 times [2021-01-06 22:54:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:38,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874490188] [2021-01-06 22:54:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:38,545 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 22:54:38,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874490188] [2021-01-06 22:54:38,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687876751] [2021-01-06 22:54:38,546 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 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 22:54:38,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:38,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:38,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:38,787 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 22:54:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022845264] [2021-01-06 22:54:38,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:38,789 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 17 states. [2021-01-06 22:54:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:39,250 INFO L93 Difference]: Finished difference Result 258 states and 645 transitions. [2021-01-06 22:54:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:54:39,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:39,253 INFO L225 Difference]: With dead ends: 258 [2021-01-06 22:54:39,253 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 22:54:39,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:54:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 22:54:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 182. [2021-01-06 22:54:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2021-01-06 22:54:39,257 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2021-01-06 22:54:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:39,257 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2021-01-06 22:54:39,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2021-01-06 22:54:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:39,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:39,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:39,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:39,459 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -148670411, now seen corresponding path program 112 times [2021-01-06 22:54:39,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:39,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834853384] [2021-01-06 22:54:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:39,570 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 22:54:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834853384] [2021-01-06 22:54:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739609463] [2021-01-06 22:54:39,571 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 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 22:54:39,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:39,810 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 22:54:39,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:39,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:39,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27720726] [2021-01-06 22:54:39,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:39,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:39,812 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 17 states. [2021-01-06 22:54:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:40,173 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2021-01-06 22:54:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:40,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:40,175 INFO L225 Difference]: With dead ends: 262 [2021-01-06 22:54:40,175 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 22:54:40,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:54:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 22:54:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 185. [2021-01-06 22:54:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 22:54:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 498 transitions. [2021-01-06 22:54:40,179 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 498 transitions. Word has length 14 [2021-01-06 22:54:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:40,179 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 498 transitions. [2021-01-06 22:54:40,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 498 transitions. [2021-01-06 22:54:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:40,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:40,180 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:40,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:40,381 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -148667528, now seen corresponding path program 113 times [2021-01-06 22:54:40,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:40,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858558733] [2021-01-06 22:54:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:40,492 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 22:54:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858558733] [2021-01-06 22:54:40,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45563472] [2021-01-06 22:54:40,493 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 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 22:54:40,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:54:40,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:40,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:40,738 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 22:54:40,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:40,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:40,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562249265] [2021-01-06 22:54:40,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:40,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:40,740 INFO L87 Difference]: Start difference. First operand 185 states and 498 transitions. Second operand 17 states. [2021-01-06 22:54:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:41,212 INFO L93 Difference]: Finished difference Result 266 states and 658 transitions. [2021-01-06 22:54:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:54:41,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:41,214 INFO L225 Difference]: With dead ends: 266 [2021-01-06 22:54:41,214 INFO L226 Difference]: Without dead ends: 264 [2021-01-06 22:54:41,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-01-06 22:54:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 178. [2021-01-06 22:54:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 480 transitions. [2021-01-06 22:54:41,218 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 480 transitions. Word has length 14 [2021-01-06 22:54:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:41,218 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 480 transitions. [2021-01-06 22:54:41,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 480 transitions. [2021-01-06 22:54:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:41,219 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:41,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:41,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-01-06 22:54:41,420 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash 622027455, now seen corresponding path program 114 times [2021-01-06 22:54:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:41,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044209251] [2021-01-06 22:54:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:41,528 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 22:54:41,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044209251] [2021-01-06 22:54:41,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365905324] [2021-01-06 22:54:41,529 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 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 22:54:41,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:41,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:41,810 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 22:54:41,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:41,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:41,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277166964] [2021-01-06 22:54:41,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:41,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:41,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:41,812 INFO L87 Difference]: Start difference. First operand 178 states and 480 transitions. Second operand 17 states. [2021-01-06 22:54:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:42,362 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2021-01-06 22:54:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:42,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:42,364 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:54:42,364 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 22:54:42,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 22:54:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 179. [2021-01-06 22:54:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 483 transitions. [2021-01-06 22:54:42,368 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 483 transitions. Word has length 14 [2021-01-06 22:54:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:42,369 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 483 transitions. [2021-01-06 22:54:42,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 483 transitions. [2021-01-06 22:54:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:42,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:42,369 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:42,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-01-06 22:54:42,570 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash 624800901, now seen corresponding path program 115 times [2021-01-06 22:54:42,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:42,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541577500] [2021-01-06 22:54:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:42,679 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 22:54:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541577500] [2021-01-06 22:54:42,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551790146] [2021-01-06 22:54:42,680 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 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 22:54:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:42,950 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 22:54:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:42,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:42,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502767513] [2021-01-06 22:54:42,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:42,953 INFO L87 Difference]: Start difference. First operand 179 states and 483 transitions. Second operand 17 states. [2021-01-06 22:54:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:43,496 INFO L93 Difference]: Finished difference Result 267 states and 656 transitions. [2021-01-06 22:54:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:54:43,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:43,499 INFO L225 Difference]: With dead ends: 267 [2021-01-06 22:54:43,499 INFO L226 Difference]: Without dead ends: 265 [2021-01-06 22:54:43,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:54:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-01-06 22:54:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 178. [2021-01-06 22:54:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 479 transitions. [2021-01-06 22:54:43,505 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 479 transitions. Word has length 14 [2021-01-06 22:54:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:43,505 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 479 transitions. [2021-01-06 22:54:43,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 479 transitions. [2021-01-06 22:54:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:43,506 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:43,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:43,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:43,719 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1203845685, now seen corresponding path program 116 times [2021-01-06 22:54:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398007143] [2021-01-06 22:54:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:43,843 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 22:54:43,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398007143] [2021-01-06 22:54:43,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149036689] [2021-01-06 22:54:43,844 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 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 22:54:43,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:43,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:44,138 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 22:54:44,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:44,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:44,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049826378] [2021-01-06 22:54:44,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:44,140 INFO L87 Difference]: Start difference. First operand 178 states and 479 transitions. Second operand 17 states. [2021-01-06 22:54:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:44,901 INFO L93 Difference]: Finished difference Result 278 states and 678 transitions. [2021-01-06 22:54:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:54:44,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:44,902 INFO L225 Difference]: With dead ends: 278 [2021-01-06 22:54:44,903 INFO L226 Difference]: Without dead ends: 276 [2021-01-06 22:54:44,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:54:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-01-06 22:54:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-01-06 22:54:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2021-01-06 22:54:44,907 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2021-01-06 22:54:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:44,907 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2021-01-06 22:54:44,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2021-01-06 22:54:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:44,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:44,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:45,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:45,108 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1225295205, now seen corresponding path program 117 times [2021-01-06 22:54:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:45,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004494535] [2021-01-06 22:54:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:45,230 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 22:54:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004494535] [2021-01-06 22:54:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885055726] [2021-01-06 22:54:45,230 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 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 22:54:45,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:45,527 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 22:54:45,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:45,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947130386] [2021-01-06 22:54:45,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:45,529 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2021-01-06 22:54:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:46,458 INFO L93 Difference]: Finished difference Result 286 states and 691 transitions. [2021-01-06 22:54:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:54:46,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:46,460 INFO L225 Difference]: With dead ends: 286 [2021-01-06 22:54:46,460 INFO L226 Difference]: Without dead ends: 284 [2021-01-06 22:54:46,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-01-06 22:54:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 179. [2021-01-06 22:54:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:54:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 486 transitions. [2021-01-06 22:54:46,465 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 486 transitions. Word has length 14 [2021-01-06 22:54:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:46,466 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 486 transitions. [2021-01-06 22:54:46,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 486 transitions. [2021-01-06 22:54:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:46,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:46,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:46,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:46,668 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1225900635, now seen corresponding path program 118 times [2021-01-06 22:54:46,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:46,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154188280] [2021-01-06 22:54:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:46,787 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 22:54:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154188280] [2021-01-06 22:54:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732466902] [2021-01-06 22:54:46,788 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 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 22:54:46,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:46,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:46,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:47,082 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 22:54:47,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:47,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979766614] [2021-01-06 22:54:47,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:47,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:47,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:47,084 INFO L87 Difference]: Start difference. First operand 179 states and 486 transitions. Second operand 17 states. [2021-01-06 22:54:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:48,131 INFO L93 Difference]: Finished difference Result 301 states and 729 transitions. [2021-01-06 22:54:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:48,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:48,134 INFO L225 Difference]: With dead ends: 301 [2021-01-06 22:54:48,134 INFO L226 Difference]: Without dead ends: 299 [2021-01-06 22:54:48,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-01-06 22:54:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 181. [2021-01-06 22:54:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 22:54:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 493 transitions. [2021-01-06 22:54:48,138 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 493 transitions. Word has length 14 [2021-01-06 22:54:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:48,139 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 493 transitions. [2021-01-06 22:54:48,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 493 transitions. [2021-01-06 22:54:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:48,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:48,139 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:48,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-01-06 22:54:48,340 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:48,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1225920072, now seen corresponding path program 119 times [2021-01-06 22:54:48,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:48,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593097304] [2021-01-06 22:54:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:48,468 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 22:54:48,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593097304] [2021-01-06 22:54:48,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132925712] [2021-01-06 22:54:48,468 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 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 22:54:48,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:48,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:48,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:54:48,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:48,724 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 22:54:48,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:48,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895137715] [2021-01-06 22:54:48,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:48,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:48,726 INFO L87 Difference]: Start difference. First operand 181 states and 493 transitions. Second operand 17 states. [2021-01-06 22:54:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:49,972 INFO L93 Difference]: Finished difference Result 333 states and 816 transitions. [2021-01-06 22:54:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 22:54:49,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:49,974 INFO L225 Difference]: With dead ends: 333 [2021-01-06 22:54:49,974 INFO L226 Difference]: Without dead ends: 325 [2021-01-06 22:54:49,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:54:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-01-06 22:54:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 185. [2021-01-06 22:54:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 22:54:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 513 transitions. [2021-01-06 22:54:49,980 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 513 transitions. Word has length 14 [2021-01-06 22:54:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:49,980 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 513 transitions. [2021-01-06 22:54:49,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 513 transitions. [2021-01-06 22:54:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:49,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:49,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:50,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-01-06 22:54:50,190 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1225922955, now seen corresponding path program 120 times [2021-01-06 22:54:50,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:50,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962109321] [2021-01-06 22:54:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:50,315 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 22:54:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962109321] [2021-01-06 22:54:50,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438088128] [2021-01-06 22:54:50,316 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 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 22:54:50,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:50,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:50,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:50,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:54:50,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:54:50,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:50,657 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 22:54:50,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:50,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:50,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527665037] [2021-01-06 22:54:50,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:50,659 INFO L87 Difference]: Start difference. First operand 185 states and 513 transitions. Second operand 18 states. [2021-01-06 22:54:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:52,169 INFO L93 Difference]: Finished difference Result 369 states and 900 transitions. [2021-01-06 22:54:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:54:52,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:52,171 INFO L225 Difference]: With dead ends: 369 [2021-01-06 22:54:52,172 INFO L226 Difference]: Without dead ends: 357 [2021-01-06 22:54:52,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=1409, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:54:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-01-06 22:54:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 178. [2021-01-06 22:54:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 477 transitions. [2021-01-06 22:54:52,176 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 477 transitions. Word has length 14 [2021-01-06 22:54:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:52,176 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 477 transitions. [2021-01-06 22:54:52,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 477 transitions. [2021-01-06 22:54:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:52,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:52,177 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:52,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-01-06 22:54:52,377 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1289736021, now seen corresponding path program 121 times [2021-01-06 22:54:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:52,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566704639] [2021-01-06 22:54:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:52,502 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 22:54:52,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566704639] [2021-01-06 22:54:52,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108595176] [2021-01-06 22:54:52,503 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 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 22:54:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:52,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:52,778 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 22:54:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055316972] [2021-01-06 22:54:52,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:52,780 INFO L87 Difference]: Start difference. First operand 178 states and 477 transitions. Second operand 17 states. [2021-01-06 22:54:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:53,573 INFO L93 Difference]: Finished difference Result 278 states and 670 transitions. [2021-01-06 22:54:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:53,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:53,575 INFO L225 Difference]: With dead ends: 278 [2021-01-06 22:54:53,576 INFO L226 Difference]: Without dead ends: 276 [2021-01-06 22:54:53,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:54:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-01-06 22:54:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-01-06 22:54:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:54:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 476 transitions. [2021-01-06 22:54:53,579 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 476 transitions. Word has length 14 [2021-01-06 22:54:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:53,579 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 476 transitions. [2021-01-06 22:54:53,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 476 transitions. [2021-01-06 22:54:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:53,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:53,579 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:53,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-01-06 22:54:53,780 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1311185541, now seen corresponding path program 122 times [2021-01-06 22:54:53,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:53,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769874037] [2021-01-06 22:54:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:53,907 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 22:54:53,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769874037] [2021-01-06 22:54:53,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717689668] [2021-01-06 22:54:53,908 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 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 22:54:53,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:54:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:54,179 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 22:54:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:54,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826898842] [2021-01-06 22:54:54,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:54,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:54,183 INFO L87 Difference]: Start difference. First operand 178 states and 476 transitions. Second operand 17 states. [2021-01-06 22:54:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:55,060 INFO L93 Difference]: Finished difference Result 287 states and 690 transitions. [2021-01-06 22:54:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:54:55,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:55,062 INFO L225 Difference]: With dead ends: 287 [2021-01-06 22:54:55,062 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 22:54:55,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 22:54:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 180. [2021-01-06 22:54:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:54:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 483 transitions. [2021-01-06 22:54:55,065 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 483 transitions. Word has length 14 [2021-01-06 22:54:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:55,066 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 483 transitions. [2021-01-06 22:54:55,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 483 transitions. [2021-01-06 22:54:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:55,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:55,066 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:55,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-01-06 22:54:55,267 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1311877461, now seen corresponding path program 123 times [2021-01-06 22:54:55,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:55,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382725067] [2021-01-06 22:54:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:55,397 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 22:54:55,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382725067] [2021-01-06 22:54:55,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247938384] [2021-01-06 22:54:55,398 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 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 22:54:55,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:54:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:55,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:55,658 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 22:54:55,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:55,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:55,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956343229] [2021-01-06 22:54:55,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:55,660 INFO L87 Difference]: Start difference. First operand 180 states and 483 transitions. Second operand 17 states. [2021-01-06 22:54:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:56,501 INFO L93 Difference]: Finished difference Result 283 states and 690 transitions. [2021-01-06 22:54:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 22:54:56,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:56,503 INFO L225 Difference]: With dead ends: 283 [2021-01-06 22:54:56,504 INFO L226 Difference]: Without dead ends: 281 [2021-01-06 22:54:56,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:54:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-01-06 22:54:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2021-01-06 22:54:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:54:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2021-01-06 22:54:56,509 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2021-01-06 22:54:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:56,510 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2021-01-06 22:54:56,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2021-01-06 22:54:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:56,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:56,510 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:56,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-01-06 22:54:56,725 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1311896898, now seen corresponding path program 124 times [2021-01-06 22:54:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:56,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714633034] [2021-01-06 22:54:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:56,859 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 22:54:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714633034] [2021-01-06 22:54:56,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288799822] [2021-01-06 22:54:56,860 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 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 22:54:56,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:54:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:57,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:54:57,142 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 22:54:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:54:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391159867] [2021-01-06 22:54:57,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:54:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:54:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:54:57,143 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 18 states. [2021-01-06 22:54:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:58,423 INFO L93 Difference]: Finished difference Result 351 states and 843 transitions. [2021-01-06 22:54:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:54:58,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:54:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:58,425 INFO L225 Difference]: With dead ends: 351 [2021-01-06 22:54:58,425 INFO L226 Difference]: Without dead ends: 339 [2021-01-06 22:54:58,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:54:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-01-06 22:54:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2021-01-06 22:54:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:54:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 458 transitions. [2021-01-06 22:54:58,429 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 458 transitions. Word has length 14 [2021-01-06 22:54:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:58,430 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 458 transitions. [2021-01-06 22:54:58,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:54:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 458 transitions. [2021-01-06 22:54:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:58,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:58,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:58,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:54:58,631 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1010518171, now seen corresponding path program 125 times [2021-01-06 22:54:58,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:58,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885603790] [2021-01-06 22:54:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:58,750 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 22:54:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885603790] [2021-01-06 22:54:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931755656] [2021-01-06 22:54:58,750 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 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 22:54:58,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:54:58,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:54:59,036 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 22:54:59,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:54:59,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:54:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59253351] [2021-01-06 22:54:59,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:54:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:54:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:54:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:54:59,038 INFO L87 Difference]: Start difference. First operand 174 states and 458 transitions. Second operand 17 states. [2021-01-06 22:54:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:54:59,514 INFO L93 Difference]: Finished difference Result 264 states and 642 transitions. [2021-01-06 22:54:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:54:59,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:54:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:54:59,516 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:54:59,516 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:54:59,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:54:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:54:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2021-01-06 22:54:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:54:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 466 transitions. [2021-01-06 22:54:59,521 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 466 transitions. Word has length 14 [2021-01-06 22:54:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:54:59,521 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 466 transitions. [2021-01-06 22:54:59,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:54:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 466 transitions. [2021-01-06 22:54:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:54:59,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:54:59,521 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:54:59,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-01-06 22:54:59,722 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:54:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:54:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1010425915, now seen corresponding path program 126 times [2021-01-06 22:54:59,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:54:59,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275917215] [2021-01-06 22:54:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:54:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:54:59,838 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 22:54:59,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275917215] [2021-01-06 22:54:59,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568910833] [2021-01-06 22:54:59,839 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 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 22:54:59,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:54:59,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:54:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:54:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:00,115 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 22:55:00,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:00,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:00,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836852181] [2021-01-06 22:55:00,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:00,117 INFO L87 Difference]: Start difference. First operand 177 states and 466 transitions. Second operand 17 states. [2021-01-06 22:55:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:00,652 INFO L93 Difference]: Finished difference Result 259 states and 631 transitions. [2021-01-06 22:55:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:55:00,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:00,655 INFO L225 Difference]: With dead ends: 259 [2021-01-06 22:55:00,655 INFO L226 Difference]: Without dead ends: 257 [2021-01-06 22:55:00,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:55:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-01-06 22:55:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2021-01-06 22:55:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 22:55:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 463 transitions. [2021-01-06 22:55:00,659 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 463 transitions. Word has length 14 [2021-01-06 22:55:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:00,659 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 463 transitions. [2021-01-06 22:55:00,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 463 transitions. [2021-01-06 22:55:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:00,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:00,660 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:00,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:00,861 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1007744725, now seen corresponding path program 127 times [2021-01-06 22:55:00,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:00,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050611461] [2021-01-06 22:55:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:00,977 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 22:55:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050611461] [2021-01-06 22:55:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408096859] [2021-01-06 22:55:00,977 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 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 22:55:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:01,253 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 22:55:01,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:01,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:01,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830408130] [2021-01-06 22:55:01,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:01,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:01,255 INFO L87 Difference]: Start difference. First operand 176 states and 463 transitions. Second operand 17 states. [2021-01-06 22:55:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:01,680 INFO L93 Difference]: Finished difference Result 253 states and 618 transitions. [2021-01-06 22:55:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:55:01,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:01,682 INFO L225 Difference]: With dead ends: 253 [2021-01-06 22:55:01,682 INFO L226 Difference]: Without dead ends: 251 [2021-01-06 22:55:01,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:55:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-01-06 22:55:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 172. [2021-01-06 22:55:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:55:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2021-01-06 22:55:01,686 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2021-01-06 22:55:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:01,686 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2021-01-06 22:55:01,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2021-01-06 22:55:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:01,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:01,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:01,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:01,888 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -428699941, now seen corresponding path program 128 times [2021-01-06 22:55:01,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:01,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598498764] [2021-01-06 22:55:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:02,005 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 22:55:02,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598498764] [2021-01-06 22:55:02,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123914409] [2021-01-06 22:55:02,006 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 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 22:55:02,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:55:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:02,313 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 22:55:02,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:02,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:02,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876253370] [2021-01-06 22:55:02,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:02,315 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2021-01-06 22:55:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:02,839 INFO L93 Difference]: Finished difference Result 261 states and 626 transitions. [2021-01-06 22:55:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:02,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:02,842 INFO L225 Difference]: With dead ends: 261 [2021-01-06 22:55:02,842 INFO L226 Difference]: Without dead ends: 259 [2021-01-06 22:55:02,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:55:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-01-06 22:55:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2021-01-06 22:55:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:55:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2021-01-06 22:55:02,853 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2021-01-06 22:55:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:02,853 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2021-01-06 22:55:02,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2021-01-06 22:55:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:02,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:02,854 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:03,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:03,070 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash -428607685, now seen corresponding path program 129 times [2021-01-06 22:55:03,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:03,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457182258] [2021-01-06 22:55:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:03,191 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 22:55:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457182258] [2021-01-06 22:55:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311008397] [2021-01-06 22:55:03,192 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 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 22:55:03,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:55:03,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:03,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:03,518 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 22:55:03,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:03,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:03,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192807692] [2021-01-06 22:55:03,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:03,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:03,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:03,520 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2021-01-06 22:55:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:04,112 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-01-06 22:55:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:55:04,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:04,114 INFO L225 Difference]: With dead ends: 262 [2021-01-06 22:55:04,114 INFO L226 Difference]: Without dead ends: 260 [2021-01-06 22:55:04,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:55:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-01-06 22:55:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2021-01-06 22:55:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 22:55:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 452 transitions. [2021-01-06 22:55:04,117 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 452 transitions. Word has length 14 [2021-01-06 22:55:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:04,118 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 452 transitions. [2021-01-06 22:55:04,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 452 transitions. [2021-01-06 22:55:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:04,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:04,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:04,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:55:04,319 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash -409931611, now seen corresponding path program 130 times [2021-01-06 22:55:04,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:04,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592563836] [2021-01-06 22:55:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:04,450 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 22:55:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592563836] [2021-01-06 22:55:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215906857] [2021-01-06 22:55:04,451 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 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 22:55:04,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:55:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:04,766 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 22:55:04,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:04,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128995227] [2021-01-06 22:55:04,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:04,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:04,768 INFO L87 Difference]: Start difference. First operand 172 states and 452 transitions. Second operand 17 states. [2021-01-06 22:55:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:05,498 INFO L93 Difference]: Finished difference Result 272 states and 651 transitions. [2021-01-06 22:55:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:55:05,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:05,501 INFO L225 Difference]: With dead ends: 272 [2021-01-06 22:55:05,501 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 22:55:05,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:55:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 22:55:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 174. [2021-01-06 22:55:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 22:55:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 462 transitions. [2021-01-06 22:55:05,505 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 462 transitions. Word has length 14 [2021-01-06 22:55:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:05,506 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 462 transitions. [2021-01-06 22:55:05,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 462 transitions. [2021-01-06 22:55:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:05,506 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:05,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:05,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-01-06 22:55:05,707 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash -409326181, now seen corresponding path program 131 times [2021-01-06 22:55:05,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:05,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885057330] [2021-01-06 22:55:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:05,843 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 22:55:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885057330] [2021-01-06 22:55:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420811633] [2021-01-06 22:55:05,844 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 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 22:55:05,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:55:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:06,180 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 22:55:06,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:06,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:55:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033496887] [2021-01-06 22:55:06,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:55:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:55:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:55:06,182 INFO L87 Difference]: Start difference. First operand 174 states and 462 transitions. Second operand 17 states. [2021-01-06 22:55:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:55:06,958 INFO L93 Difference]: Finished difference Result 273 states and 666 transitions. [2021-01-06 22:55:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:55:06,960 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:55:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:55:06,961 INFO L225 Difference]: With dead ends: 273 [2021-01-06 22:55:06,962 INFO L226 Difference]: Without dead ends: 271 [2021-01-06 22:55:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:55:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-01-06 22:55:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 177. [2021-01-06 22:55:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:55:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2021-01-06 22:55:06,967 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2021-01-06 22:55:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:55:06,968 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2021-01-06 22:55:06,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:55:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2021-01-06 22:55:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:55:06,968 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:55:06,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:55:07,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-01-06 22:55:07,181 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:55:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:55:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -409303861, now seen corresponding path program 132 times [2021-01-06 22:55:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:55:07,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892333035] [2021-01-06 22:55:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:55:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:55:07,339 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 22:55:07,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892333035] [2021-01-06 22:55:07,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392441204] [2021-01-06 22:55:07,340 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 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 22:55:07,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:55:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:55:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:55:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:55:07,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:55:07,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:55:07,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:07,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:55:07,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:55:07,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 22:55:07,719 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 22:55:07,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:55:07,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:55:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636635871] [2021-01-06 22:55:07,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:55:07,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:55:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:55:07,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:55:07,721 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 18 states. [2021-01-06 22:55:16,085 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 22:55:30,633 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-01-06 22:55:32,887 WARN L197 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 60 DAG size of output: 29 [2021-01-06 22:55:43,081 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 22:56:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:21,536 INFO L93 Difference]: Finished difference Result 373 states and 899 transitions. [2021-01-06 22:56:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:56:21,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:56:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:21,538 INFO L225 Difference]: With dead ends: 373 [2021-01-06 22:56:21,538 INFO L226 Difference]: Without dead ends: 365 [2021-01-06 22:56:21,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=500, Invalid=1296, Unknown=10, NotChecked=0, Total=1806 [2021-01-06 22:56:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-01-06 22:56:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 178. [2021-01-06 22:56:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 22:56:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 472 transitions. [2021-01-06 22:56:21,544 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 472 transitions. Word has length 14 [2021-01-06 22:56:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:21,544 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 472 transitions. [2021-01-06 22:56:21,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:56:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 472 transitions. [2021-01-06 22:56:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:21,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:21,544 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:21,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-01-06 22:56:21,745 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash -407158165, now seen corresponding path program 133 times [2021-01-06 22:56:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:21,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578301983] [2021-01-06 22:56:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:21,894 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 22:56:21,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578301983] [2021-01-06 22:56:21,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241198074] [2021-01-06 22:56:21,895 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 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 22:56:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:56:21,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:22,248 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 22:56:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:22,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:56:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912149631] [2021-01-06 22:56:22,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:56:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:56:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:56:22,251 INFO L87 Difference]: Start difference. First operand 178 states and 472 transitions. Second operand 17 states. [2021-01-06 22:56:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:23,173 INFO L93 Difference]: Finished difference Result 277 states and 671 transitions. [2021-01-06 22:56:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:56:23,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:56:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:23,176 INFO L225 Difference]: With dead ends: 277 [2021-01-06 22:56:23,176 INFO L226 Difference]: Without dead ends: 275 [2021-01-06 22:56:23,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:56:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-01-06 22:56:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 180. [2021-01-06 22:56:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 22:56:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 479 transitions. [2021-01-06 22:56:23,181 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 479 transitions. Word has length 14 [2021-01-06 22:56:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:23,182 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 479 transitions. [2021-01-06 22:56:23,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:56:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 479 transitions. [2021-01-06 22:56:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:23,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:23,182 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:23,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-01-06 22:56:23,385 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash -406466245, now seen corresponding path program 134 times [2021-01-06 22:56:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:23,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78043557] [2021-01-06 22:56:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:23,531 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 22:56:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78043557] [2021-01-06 22:56:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496282365] [2021-01-06 22:56:23,532 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 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 22:56:23,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:23,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:56:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:23,898 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 22:56:23,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:23,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:56:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069208894] [2021-01-06 22:56:23,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:56:23,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:56:23,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:56:23,901 INFO L87 Difference]: Start difference. First operand 180 states and 479 transitions. Second operand 17 states. [2021-01-06 22:56:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:24,782 INFO L93 Difference]: Finished difference Result 279 states and 685 transitions. [2021-01-06 22:56:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:56:24,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:56:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:24,784 INFO L225 Difference]: With dead ends: 279 [2021-01-06 22:56:24,784 INFO L226 Difference]: Without dead ends: 277 [2021-01-06 22:56:24,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:56:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-01-06 22:56:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 182. [2021-01-06 22:56:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:56:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 486 transitions. [2021-01-06 22:56:24,789 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 486 transitions. Word has length 14 [2021-01-06 22:56:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:24,790 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 486 transitions. [2021-01-06 22:56:24,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:56:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 486 transitions. [2021-01-06 22:56:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:24,790 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:24,790 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:24,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:24,997 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -406446808, now seen corresponding path program 135 times [2021-01-06 22:56:24,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:24,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327307803] [2021-01-06 22:56:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:25,176 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 22:56:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327307803] [2021-01-06 22:56:25,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471048062] [2021-01-06 22:56:25,177 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 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 22:56:25,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:56:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:56:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:25,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:25,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:25,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:25,554 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 22:56:25,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:25,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:56:25,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431673522] [2021-01-06 22:56:25,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:56:25,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:25,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:56:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:56:25,555 INFO L87 Difference]: Start difference. First operand 182 states and 486 transitions. Second operand 18 states. [2021-01-06 22:56:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:26,915 INFO L93 Difference]: Finished difference Result 346 states and 844 transitions. [2021-01-06 22:56:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:56:26,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:56:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:26,918 INFO L225 Difference]: With dead ends: 346 [2021-01-06 22:56:26,918 INFO L226 Difference]: Without dead ends: 334 [2021-01-06 22:56:26,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:56:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-01-06 22:56:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 177. [2021-01-06 22:56:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:56:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 470 transitions. [2021-01-06 22:56:26,923 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 470 transitions. Word has length 14 [2021-01-06 22:56:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:26,923 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 470 transitions. [2021-01-06 22:56:26,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:56:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 470 transitions. [2021-01-06 22:56:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:26,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:26,923 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:27,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-01-06 22:56:27,124 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -342809605, now seen corresponding path program 136 times [2021-01-06 22:56:27,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:27,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543720071] [2021-01-06 22:56:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:27,263 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 22:56:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543720071] [2021-01-06 22:56:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770325851] [2021-01-06 22:56:27,264 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 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 22:56:27,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:27,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:56:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:27,618 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 22:56:27,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:27,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:56:27,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015809506] [2021-01-06 22:56:27,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:56:27,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:56:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:56:27,619 INFO L87 Difference]: Start difference. First operand 177 states and 470 transitions. Second operand 17 states. [2021-01-06 22:56:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:28,198 INFO L93 Difference]: Finished difference Result 257 states and 631 transitions. [2021-01-06 22:56:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:56:28,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:56:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:28,201 INFO L225 Difference]: With dead ends: 257 [2021-01-06 22:56:28,201 INFO L226 Difference]: Without dead ends: 255 [2021-01-06 22:56:28,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:56:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-01-06 22:56:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2021-01-06 22:56:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:56:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 465 transitions. [2021-01-06 22:56:28,206 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 465 transitions. Word has length 14 [2021-01-06 22:56:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:28,206 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 465 transitions. [2021-01-06 22:56:28,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:56:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 465 transitions. [2021-01-06 22:56:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:28,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:28,207 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:28,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:28,413 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -324041275, now seen corresponding path program 137 times [2021-01-06 22:56:28,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:28,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735885774] [2021-01-06 22:56:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:28,567 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 22:56:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735885774] [2021-01-06 22:56:28,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643412572] [2021-01-06 22:56:28,568 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 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 22:56:28,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:56:28,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:56:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:28,939 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 22:56:28,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:28,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:56:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216080384] [2021-01-06 22:56:28,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:56:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:56:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:56:28,940 INFO L87 Difference]: Start difference. First operand 175 states and 465 transitions. Second operand 17 states. [2021-01-06 22:56:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:29,648 INFO L93 Difference]: Finished difference Result 264 states and 645 transitions. [2021-01-06 22:56:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:56:29,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:56:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:29,650 INFO L225 Difference]: With dead ends: 264 [2021-01-06 22:56:29,650 INFO L226 Difference]: Without dead ends: 262 [2021-01-06 22:56:29,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:56:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-01-06 22:56:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2021-01-06 22:56:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 22:56:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 472 transitions. [2021-01-06 22:56:29,654 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 472 transitions. Word has length 14 [2021-01-06 22:56:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:29,654 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 472 transitions. [2021-01-06 22:56:29,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:56:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 472 transitions. [2021-01-06 22:56:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:29,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:29,655 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:29,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:29,855 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -323349355, now seen corresponding path program 138 times [2021-01-06 22:56:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:29,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283867825] [2021-01-06 22:56:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:30,014 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 22:56:30,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283867825] [2021-01-06 22:56:30,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852725469] [2021-01-06 22:56:30,015 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 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 22:56:30,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:30,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:56:30,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:30,404 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 22:56:30,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:30,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-01-06 22:56:30,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304383600] [2021-01-06 22:56:30,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:56:30,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:30,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:56:30,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:56:30,405 INFO L87 Difference]: Start difference. First operand 177 states and 472 transitions. Second operand 17 states. [2021-01-06 22:56:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:31,178 INFO L93 Difference]: Finished difference Result 272 states and 668 transitions. [2021-01-06 22:56:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:56:31,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2021-01-06 22:56:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:31,180 INFO L225 Difference]: With dead ends: 272 [2021-01-06 22:56:31,180 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 22:56:31,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:56:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 22:56:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 179. [2021-01-06 22:56:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 22:56:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 479 transitions. [2021-01-06 22:56:31,185 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 479 transitions. Word has length 14 [2021-01-06 22:56:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:31,185 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 479 transitions. [2021-01-06 22:56:31,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:56:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 479 transitions. [2021-01-06 22:56:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:31,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:31,186 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:31,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:31,389 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash -323329918, now seen corresponding path program 139 times [2021-01-06 22:56:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:31,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289739008] [2021-01-06 22:56:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:31,541 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 22:56:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289739008] [2021-01-06 22:56:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338813311] [2021-01-06 22:56:31,541 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 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 22:56:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:31,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:56:31,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:31,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:31,889 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:31,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:31,942 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 22:56:31,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:31,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-01-06 22:56:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137383257] [2021-01-06 22:56:31,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:56:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:56:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:56:31,943 INFO L87 Difference]: Start difference. First operand 179 states and 479 transitions. Second operand 18 states. [2021-01-06 22:56:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:33,181 INFO L93 Difference]: Finished difference Result 344 states and 844 transitions. [2021-01-06 22:56:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:56:33,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2021-01-06 22:56:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:33,184 INFO L225 Difference]: With dead ends: 344 [2021-01-06 22:56:33,184 INFO L226 Difference]: Without dead ends: 332 [2021-01-06 22:56:33,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:56:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-01-06 22:56:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 175. [2021-01-06 22:56:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 22:56:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 465 transitions. [2021-01-06 22:56:33,188 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 465 transitions. Word has length 14 [2021-01-06 22:56:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:33,193 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 465 transitions. [2021-01-06 22:56:33,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:56:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 465 transitions. [2021-01-06 22:56:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:33,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:33,194 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:33,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-01-06 22:56:33,395 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1017682108, now seen corresponding path program 22 times [2021-01-06 22:56:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:33,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84181931] [2021-01-06 22:56:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84181931] [2021-01-06 22:56:33,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297204292] [2021-01-06 22:56:33,595 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 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 22:56:33,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:33,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:33,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:33,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212543297] [2021-01-06 22:56:33,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:33,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:33,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:33,989 INFO L87 Difference]: Start difference. First operand 175 states and 465 transitions. Second operand 19 states. [2021-01-06 22:56:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:34,070 INFO L93 Difference]: Finished difference Result 228 states and 578 transitions. [2021-01-06 22:56:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:56:34,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:34,072 INFO L225 Difference]: With dead ends: 228 [2021-01-06 22:56:34,072 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 22:56:34,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 22:56:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 185. [2021-01-06 22:56:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 22:56:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 488 transitions. [2021-01-06 22:56:34,077 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 488 transitions. Word has length 14 [2021-01-06 22:56:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:34,077 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 488 transitions. [2021-01-06 22:56:34,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 488 transitions. [2021-01-06 22:56:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:34,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:34,077 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:34,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:34,278 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -432872108, now seen corresponding path program 23 times [2021-01-06 22:56:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:34,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401985418] [2021-01-06 22:56:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:34,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401985418] [2021-01-06 22:56:34,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935475384] [2021-01-06 22:56:34,490 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 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 22:56:34,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:56:34,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:34,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:34,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339943451] [2021-01-06 22:56:34,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:34,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:34,868 INFO L87 Difference]: Start difference. First operand 185 states and 488 transitions. Second operand 19 states. [2021-01-06 22:56:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:35,005 INFO L93 Difference]: Finished difference Result 247 states and 614 transitions. [2021-01-06 22:56:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:56:35,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:35,010 INFO L225 Difference]: With dead ends: 247 [2021-01-06 22:56:35,010 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 22:56:35,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 22:56:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 184. [2021-01-06 22:56:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 22:56:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 485 transitions. [2021-01-06 22:56:35,014 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 485 transitions. Word has length 14 [2021-01-06 22:56:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:35,014 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 485 transitions. [2021-01-06 22:56:35,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 485 transitions. [2021-01-06 22:56:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:35,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:35,016 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:35,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-01-06 22:56:35,231 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1380348892, now seen corresponding path program 24 times [2021-01-06 22:56:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:35,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923183455] [2021-01-06 22:56:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:35,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923183455] [2021-01-06 22:56:35,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161410685] [2021-01-06 22:56:35,416 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 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 22:56:35,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:56:35,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:35,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:35,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:35,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:35,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:35,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281341493] [2021-01-06 22:56:35,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:35,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:35,804 INFO L87 Difference]: Start difference. First operand 184 states and 485 transitions. Second operand 19 states. [2021-01-06 22:56:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:35,963 INFO L93 Difference]: Finished difference Result 244 states and 606 transitions. [2021-01-06 22:56:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:56:35,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:35,966 INFO L225 Difference]: With dead ends: 244 [2021-01-06 22:56:35,966 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 22:56:35,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:56:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 22:56:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 183. [2021-01-06 22:56:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 22:56:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 482 transitions. [2021-01-06 22:56:35,970 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 482 transitions. Word has length 14 [2021-01-06 22:56:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:35,970 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 482 transitions. [2021-01-06 22:56:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 482 transitions. [2021-01-06 22:56:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:35,970 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:35,970 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:36,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:36,171 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:36,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2052770644, now seen corresponding path program 25 times [2021-01-06 22:56:36,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:36,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900040340] [2021-01-06 22:56:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:36,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900040340] [2021-01-06 22:56:36,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590000009] [2021-01-06 22:56:36,359 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 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 22:56:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:36,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:36,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:36,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009601350] [2021-01-06 22:56:36,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:36,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:36,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:36,728 INFO L87 Difference]: Start difference. First operand 183 states and 482 transitions. Second operand 19 states. [2021-01-06 22:56:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:36,932 INFO L93 Difference]: Finished difference Result 241 states and 598 transitions. [2021-01-06 22:56:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:56:36,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:36,935 INFO L225 Difference]: With dead ends: 241 [2021-01-06 22:56:36,935 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 22:56:36,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:56:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 22:56:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2021-01-06 22:56:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 22:56:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 479 transitions. [2021-01-06 22:56:36,939 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 479 transitions. Word has length 14 [2021-01-06 22:56:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:36,939 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 479 transitions. [2021-01-06 22:56:36,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 479 transitions. [2021-01-06 22:56:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:36,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:36,939 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:37,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-01-06 22:56:37,140 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1577261532, now seen corresponding path program 26 times [2021-01-06 22:56:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:37,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64448942] [2021-01-06 22:56:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:37,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64448942] [2021-01-06 22:56:37,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656746289] [2021-01-06 22:56:37,321 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 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 22:56:37,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:37,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:37,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:37,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182890500] [2021-01-06 22:56:37,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:37,694 INFO L87 Difference]: Start difference. First operand 182 states and 479 transitions. Second operand 19 states. [2021-01-06 22:56:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:37,971 INFO L93 Difference]: Finished difference Result 240 states and 598 transitions. [2021-01-06 22:56:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:56:37,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:37,973 INFO L225 Difference]: With dead ends: 240 [2021-01-06 22:56:37,973 INFO L226 Difference]: Without dead ends: 237 [2021-01-06 22:56:37,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:56:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-01-06 22:56:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2021-01-06 22:56:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 22:56:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 484 transitions. [2021-01-06 22:56:37,976 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 484 transitions. Word has length 14 [2021-01-06 22:56:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:37,977 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 484 transitions. [2021-01-06 22:56:37,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 484 transitions. [2021-01-06 22:56:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:37,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:37,977 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:38,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-01-06 22:56:38,178 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1555812012, now seen corresponding path program 27 times [2021-01-06 22:56:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:38,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326984090] [2021-01-06 22:56:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326984090] [2021-01-06 22:56:38,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449325267] [2021-01-06 22:56:38,350 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 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 22:56:38,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:56:38,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:56:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:38,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:38,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:38,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576877576] [2021-01-06 22:56:38,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:38,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:38,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:38,718 INFO L87 Difference]: Start difference. First operand 183 states and 484 transitions. Second operand 19 states. [2021-01-06 22:56:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:39,047 INFO L93 Difference]: Finished difference Result 239 states and 598 transitions. [2021-01-06 22:56:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:56:39,048 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:39,049 INFO L225 Difference]: With dead ends: 239 [2021-01-06 22:56:39,049 INFO L226 Difference]: Without dead ends: 236 [2021-01-06 22:56:39,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:56:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-01-06 22:56:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 185. [2021-01-06 22:56:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 22:56:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 491 transitions. [2021-01-06 22:56:39,053 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 491 transitions. Word has length 14 [2021-01-06 22:56:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:39,053 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 491 transitions. [2021-01-06 22:56:39,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 491 transitions. [2021-01-06 22:56:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:39,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:39,053 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:39,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:39,254 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1555120092, now seen corresponding path program 28 times [2021-01-06 22:56:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:39,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978042417] [2021-01-06 22:56:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978042417] [2021-01-06 22:56:39,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676869294] [2021-01-06 22:56:39,430 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 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 22:56:39,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:39,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:39,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-01-06 22:56:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994317501] [2021-01-06 22:56:39,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:56:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:56:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:56:39,803 INFO L87 Difference]: Start difference. First operand 185 states and 491 transitions. Second operand 19 states. [2021-01-06 22:56:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:40,181 INFO L93 Difference]: Finished difference Result 238 states and 598 transitions. [2021-01-06 22:56:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:56:40,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2021-01-06 22:56:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:40,184 INFO L225 Difference]: With dead ends: 238 [2021-01-06 22:56:40,184 INFO L226 Difference]: Without dead ends: 235 [2021-01-06 22:56:40,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:56:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-01-06 22:56:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 187. [2021-01-06 22:56:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 22:56:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 498 transitions. [2021-01-06 22:56:40,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 498 transitions. Word has length 14 [2021-01-06 22:56:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:40,190 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 498 transitions. [2021-01-06 22:56:40,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:56:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 498 transitions. [2021-01-06 22:56:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:56:40,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:40,190 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:40,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:40,402 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1555097772, now seen corresponding path program 29 times [2021-01-06 22:56:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:40,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843381138] [2021-01-06 22:56:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:40,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843381138] [2021-01-06 22:56:40,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519257694] [2021-01-06 22:56:40,618 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 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 22:56:40,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:56:40,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:41,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:41,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:41,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876092920] [2021-01-06 22:56:41,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:41,145 INFO L87 Difference]: Start difference. First operand 187 states and 498 transitions. Second operand 20 states. [2021-01-06 22:56:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:41,810 INFO L93 Difference]: Finished difference Result 263 states and 660 transitions. [2021-01-06 22:56:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:56:41,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2021-01-06 22:56:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:41,813 INFO L225 Difference]: With dead ends: 263 [2021-01-06 22:56:41,813 INFO L226 Difference]: Without dead ends: 251 [2021-01-06 22:56:41,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:56:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-01-06 22:56:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 189. [2021-01-06 22:56:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-01-06 22:56:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 509 transitions. [2021-01-06 22:56:41,818 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 509 transitions. Word has length 14 [2021-01-06 22:56:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:41,818 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 509 transitions. [2021-01-06 22:56:41,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 509 transitions. [2021-01-06 22:56:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:41,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:41,819 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:42,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-01-06 22:56:42,029 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1759455308, now seen corresponding path program 5 times [2021-01-06 22:56:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164432426] [2021-01-06 22:56:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164432426] [2021-01-06 22:56:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603116489] [2021-01-06 22:56:42,264 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 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 22:56:42,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:56:42,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:56:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:42,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:56:42,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:42,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-01-06 22:56:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848480172] [2021-01-06 22:56:42,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:56:42,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:56:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:56:42,761 INFO L87 Difference]: Start difference. First operand 189 states and 509 transitions. Second operand 22 states. [2021-01-06 22:56:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:43,298 INFO L93 Difference]: Finished difference Result 278 states and 701 transitions. [2021-01-06 22:56:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:56:43,299 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15 [2021-01-06 22:56:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:43,300 INFO L225 Difference]: With dead ends: 278 [2021-01-06 22:56:43,300 INFO L226 Difference]: Without dead ends: 270 [2021-01-06 22:56:43,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:56:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-01-06 22:56:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 202. [2021-01-06 22:56:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 22:56:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 556 transitions. [2021-01-06 22:56:43,303 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 556 transitions. Word has length 15 [2021-01-06 22:56:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:43,303 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 556 transitions. [2021-01-06 22:56:43,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:56:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 556 transitions. [2021-01-06 22:56:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:43,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:43,304 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:43,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:43,507 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1032767072, now seen corresponding path program 140 times [2021-01-06 22:56:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:43,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051135752] [2021-01-06 22:56:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:43,697 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 22:56:43,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051135752] [2021-01-06 22:56:43,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693183529] [2021-01-06 22:56:43,697 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 22:56:43,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:44,165 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 22:56:44,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:44,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:44,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956688758] [2021-01-06 22:56:44,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:44,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:44,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:44,167 INFO L87 Difference]: Start difference. First operand 202 states and 556 transitions. Second operand 20 states. [2021-01-06 22:56:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:44,550 INFO L93 Difference]: Finished difference Result 253 states and 652 transitions. [2021-01-06 22:56:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:56:44,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:44,553 INFO L225 Difference]: With dead ends: 253 [2021-01-06 22:56:44,553 INFO L226 Difference]: Without dead ends: 251 [2021-01-06 22:56:44,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:56:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-01-06 22:56:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 210. [2021-01-06 22:56:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-01-06 22:56:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 572 transitions. [2021-01-06 22:56:44,556 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 572 transitions. Word has length 15 [2021-01-06 22:56:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:44,556 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 572 transitions. [2021-01-06 22:56:44,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 572 transitions. [2021-01-06 22:56:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:44,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:44,557 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:44,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:44,758 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1033135352, now seen corresponding path program 141 times [2021-01-06 22:56:44,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:44,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961819347] [2021-01-06 22:56:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:44,943 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 22:56:44,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961819347] [2021-01-06 22:56:44,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642592446] [2021-01-06 22:56:44,944 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 22:56:45,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:56:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:45,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:45,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 22:56:45,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:45,369 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 22:56:45,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:45,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:45,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585345374] [2021-01-06 22:56:45,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:45,371 INFO L87 Difference]: Start difference. First operand 210 states and 572 transitions. Second operand 20 states. [2021-01-06 22:56:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:46,344 INFO L93 Difference]: Finished difference Result 343 states and 861 transitions. [2021-01-06 22:56:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:56:46,346 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:46,346 INFO L225 Difference]: With dead ends: 343 [2021-01-06 22:56:46,347 INFO L226 Difference]: Without dead ends: 331 [2021-01-06 22:56:46,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=885, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:56:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-01-06 22:56:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 205. [2021-01-06 22:56:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 22:56:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 565 transitions. [2021-01-06 22:56:46,353 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 565 transitions. Word has length 15 [2021-01-06 22:56:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:46,353 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 565 transitions. [2021-01-06 22:56:46,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 565 transitions. [2021-01-06 22:56:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:46,353 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:46,353 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:46,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:46,554 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1529917123, now seen corresponding path program 142 times [2021-01-06 22:56:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:46,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228260019] [2021-01-06 22:56:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:46,752 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 22:56:46,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228260019] [2021-01-06 22:56:46,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962814313] [2021-01-06 22:56:46,753 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 22:56:46,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:56:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:47,219 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 22:56:47,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:47,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:47,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87415414] [2021-01-06 22:56:47,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:47,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:47,220 INFO L87 Difference]: Start difference. First operand 205 states and 565 transitions. Second operand 20 states. [2021-01-06 22:56:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:47,940 INFO L93 Difference]: Finished difference Result 293 states and 739 transitions. [2021-01-06 22:56:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:56:47,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:47,943 INFO L225 Difference]: With dead ends: 293 [2021-01-06 22:56:47,943 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 22:56:47,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:56:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 22:56:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 209. [2021-01-06 22:56:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 22:56:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 571 transitions. [2021-01-06 22:56:47,947 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 571 transitions. Word has length 15 [2021-01-06 22:56:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:47,947 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 571 transitions. [2021-01-06 22:56:47,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 571 transitions. [2021-01-06 22:56:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:47,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:47,948 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:48,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-01-06 22:56:48,163 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1176000043, now seen corresponding path program 143 times [2021-01-06 22:56:48,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:48,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69280544] [2021-01-06 22:56:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:48,353 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 22:56:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69280544] [2021-01-06 22:56:48,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421918206] [2021-01-06 22:56:48,354 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 22:56:48,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:56:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:48,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:48,840 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 22:56:48,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:48,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:48,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597589387] [2021-01-06 22:56:48,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:48,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:48,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:48,842 INFO L87 Difference]: Start difference. First operand 209 states and 571 transitions. Second operand 20 states. [2021-01-06 22:56:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:49,695 INFO L93 Difference]: Finished difference Result 310 states and 776 transitions. [2021-01-06 22:56:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:56:49,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:49,697 INFO L225 Difference]: With dead ends: 310 [2021-01-06 22:56:49,697 INFO L226 Difference]: Without dead ends: 308 [2021-01-06 22:56:49,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:56:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-01-06 22:56:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 211. [2021-01-06 22:56:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2021-01-06 22:56:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 578 transitions. [2021-01-06 22:56:49,701 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 578 transitions. Word has length 15 [2021-01-06 22:56:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:49,701 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 578 transitions. [2021-01-06 22:56:49,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 578 transitions. [2021-01-06 22:56:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:49,702 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:49,702 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:49,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:56:49,903 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1175394613, now seen corresponding path program 144 times [2021-01-06 22:56:49,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:49,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320847758] [2021-01-06 22:56:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:50,088 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 22:56:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320847758] [2021-01-06 22:56:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273840499] [2021-01-06 22:56:50,089 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 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 22:56:50,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:56:50,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:50,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:50,551 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 22:56:50,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:50,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010164917] [2021-01-06 22:56:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:50,553 INFO L87 Difference]: Start difference. First operand 211 states and 578 transitions. Second operand 20 states. [2021-01-06 22:56:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:51,531 INFO L93 Difference]: Finished difference Result 313 states and 796 transitions. [2021-01-06 22:56:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:56:51,533 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:51,534 INFO L225 Difference]: With dead ends: 313 [2021-01-06 22:56:51,534 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 22:56:51,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:56:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 22:56:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 213. [2021-01-06 22:56:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-01-06 22:56:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 585 transitions. [2021-01-06 22:56:51,538 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 585 transitions. Word has length 15 [2021-01-06 22:56:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:51,538 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 585 transitions. [2021-01-06 22:56:51,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 585 transitions. [2021-01-06 22:56:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:51,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:51,539 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:51,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-01-06 22:56:51,740 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1175375176, now seen corresponding path program 145 times [2021-01-06 22:56:51,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:51,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030817742] [2021-01-06 22:56:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:51,942 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 22:56:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030817742] [2021-01-06 22:56:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848720283] [2021-01-06 22:56:51,943 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 22:56:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:52,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:52,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 22:56:52,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:56:52,388 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 22:56:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895038744] [2021-01-06 22:56:52,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:52,390 INFO L87 Difference]: Start difference. First operand 213 states and 585 transitions. Second operand 20 states. [2021-01-06 22:56:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:56:53,839 INFO L93 Difference]: Finished difference Result 372 states and 935 transitions. [2021-01-06 22:56:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 22:56:53,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:56:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:56:53,842 INFO L225 Difference]: With dead ends: 372 [2021-01-06 22:56:53,842 INFO L226 Difference]: Without dead ends: 360 [2021-01-06 22:56:53,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:56:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-01-06 22:56:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 209. [2021-01-06 22:56:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 22:56:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 581 transitions. [2021-01-06 22:56:53,847 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 581 transitions. Word has length 15 [2021-01-06 22:56:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:56:53,847 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 581 transitions. [2021-01-06 22:56:53,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:56:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 581 transitions. [2021-01-06 22:56:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:56:53,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:56:53,848 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:56:54,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-01-06 22:56:54,049 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:56:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:56:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1449464402, now seen corresponding path program 146 times [2021-01-06 22:56:54,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:56:54,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158126041] [2021-01-06 22:56:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:56:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:56:54,268 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 22:56:54,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158126041] [2021-01-06 22:56:54,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52792781] [2021-01-06 22:56:54,269 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 22:56:54,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:56:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:56:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:56:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:56:54,956 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 22:56:54,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:56:54,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:56:54,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134959643] [2021-01-06 22:56:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:56:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:56:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:56:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:56:54,958 INFO L87 Difference]: Start difference. First operand 209 states and 581 transitions. Second operand 20 states. [2021-01-06 22:57:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:00,129 INFO L93 Difference]: Finished difference Result 323 states and 811 transitions. [2021-01-06 22:57:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:57:00,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2021-01-06 22:57:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:00,132 INFO L225 Difference]: With dead ends: 323 [2021-01-06 22:57:00,132 INFO L226 Difference]: Without dead ends: 319 [2021-01-06 22:57:00,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:57:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-01-06 22:57:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 214. [2021-01-06 22:57:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2021-01-06 22:57:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 590 transitions. [2021-01-06 22:57:00,136 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 590 transitions. Word has length 15 [2021-01-06 22:57:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:00,137 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 590 transitions. [2021-01-06 22:57:00,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:57:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 590 transitions. [2021-01-06 22:57:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:57:00,137 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:00,137 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:00,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:57:00,338 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash 932030486, now seen corresponding path program 147 times [2021-01-06 22:57:00,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:00,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267058847] [2021-01-06 22:57:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:00,545 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 22:57:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267058847] [2021-01-06 22:57:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014676264] [2021-01-06 22:57:00,546 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 22:57:00,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:57:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:57:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:57:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:57:01,280 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 22:57:01,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:57:01,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-01-06 22:57:01,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68107398] [2021-01-06 22:57:01,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:57:01,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:57:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:57:01,281 INFO L87 Difference]: Start difference. First operand 214 states and 590 transitions. Second operand 20 states.