/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/bitvector/num_conversion_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:38:05,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:38:05,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:38:05,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:38:05,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:38:05,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:38:05,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:38:05,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:38:05,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:38:05,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:38:05,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:38:05,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:38:05,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:38:06,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:38:06,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:38:06,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:38:06,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:38:06,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:38:06,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:38:06,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:38:06,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:38:06,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:38:06,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:38:06,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:38:06,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 01:38:06,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 01:38:06,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 01:38:06,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 01:38:06,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 01:38:06,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 01:38:06,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:38:06,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:38:06,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:38:06,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:38:06,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:38:06,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:38:06,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:38:06,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:38:06,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:38:06,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:38:06,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:38:06,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:38:06,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:38:06,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:38:06,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:38:06,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:38:06,141 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:38:06,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:38:06,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:38:06,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:38:06,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:38:06,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:38:06,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:38:06,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:38:06,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:38:06,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:38:06,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:38:06,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:38:06,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:38:06,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:38:06,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:38:06,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:38:06,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:38:06,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:38:06,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:38:06,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:38:06,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:38:06,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:38:06,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:38:06,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:38:06,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:38:06,677 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:38:06,678 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:38:06,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-23 01:38:06,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6dd928d37/44d9dbb4733d4ee39f78379fb736df2f/FLAGd138ea92f [2020-12-23 01:38:07,407 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:38:07,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2020-12-23 01:38:07,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6dd928d37/44d9dbb4733d4ee39f78379fb736df2f/FLAGd138ea92f [2020-12-23 01:38:07,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6dd928d37/44d9dbb4733d4ee39f78379fb736df2f [2020-12-23 01:38:07,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:38:07,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:38:07,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:38:07,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:38:07,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:38:07,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:38:07" (1/1) ... [2020-12-23 01:38:07,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c82e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:07, skipping insertion in model container [2020-12-23 01:38:07,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:38:07" (1/1) ... [2020-12-23 01:38:07,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:38:07,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:38:07,971 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/bitvector/num_conversion_2.c[380,393] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2020-12-23 01:38:07,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:38:08,000 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:38:08,015 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/bitvector/num_conversion_2.c[380,393] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] [2020-12-23 01:38:08,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:38:08,040 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:38:08,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08 WrapperNode [2020-12-23 01:38:08,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:38:08,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:38:08,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:38:08,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:38:08,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:38:08,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:38:08,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:38:08,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:38:08,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (1/1) ... [2020-12-23 01:38:08,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:38:08,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:38:08,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:38:08,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:38:08,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (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 [2020-12-23 01:38:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:38:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:38:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:38:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:38:08,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:38:08,578 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 01:38:08,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:38:08 BoogieIcfgContainer [2020-12-23 01:38:08,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:38:08,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:38:08,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:38:08,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:38:08,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:38:07" (1/3) ... [2020-12-23 01:38:08,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:38:08, skipping insertion in model container [2020-12-23 01:38:08,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:38:08" (2/3) ... [2020-12-23 01:38:08,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:38:08, skipping insertion in model container [2020-12-23 01:38:08,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:38:08" (3/3) ... [2020-12-23 01:38:08,621 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2020-12-23 01:38:08,635 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:38:08,648 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:38:08,700 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:38:08,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:38:08,770 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:38:08,771 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:38:08,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:38:08,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:38:08,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:38:08,775 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:38:08,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:38:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 01:38:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 01:38:08,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:08,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 01:38:08,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-12-23 01:38:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:08,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177406336] [2020-12-23 01:38:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:09,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177406336] [2020-12-23 01:38:09,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:38:09,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:38:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636060194] [2020-12-23 01:38:09,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:38:09,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:38:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:38:09,093 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 01:38:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:09,113 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-23 01:38:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:38:09,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 01:38:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:09,145 INFO L225 Difference]: With dead ends: 21 [2020-12-23 01:38:09,146 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 01:38:09,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:38:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 01:38:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 01:38:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 01:38:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-23 01:38:09,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-23 01:38:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:09,200 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-23 01:38:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:38:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-23 01:38:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 01:38:09,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:09,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 01:38:09,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:38:09,203 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-12-23 01:38:09,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:09,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566185086] [2020-12-23 01:38:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:09,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566185086] [2020-12-23 01:38:09,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:38:09,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:38:09,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122297657] [2020-12-23 01:38:09,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:38:09,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:09,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:38:09,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:38:09,358 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-12-23 01:38:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:09,381 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 01:38:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:38:09,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 01:38:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:09,383 INFO L225 Difference]: With dead ends: 16 [2020-12-23 01:38:09,383 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 01:38:09,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:38:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 01:38:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-23 01:38:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 01:38:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 01:38:09,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 01:38:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:09,389 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 01:38:09,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:38:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 01:38:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:38:09,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:09,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:09,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:38:09,391 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2020-12-23 01:38:09,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:09,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366391934] [2020-12-23 01:38:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:09,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366391934] [2020-12-23 01:38:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747667023] [2020-12-23 01:38:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-23 01:38:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:38:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:09,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:09,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:38:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284574381] [2020-12-23 01:38:09,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:38:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:38:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:38:09,742 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 01:38:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:09,799 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-23 01:38:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:38:09,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 01:38:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:09,801 INFO L225 Difference]: With dead ends: 19 [2020-12-23 01:38:09,802 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:38:09,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:38:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:38:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-12-23 01:38:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 01:38:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 01:38:09,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-23 01:38:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:09,817 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 01:38:09,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:38:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 01:38:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 01:38:09,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:09,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:10,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:38:10,033 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:10,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2020-12-23 01:38:10,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:10,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571461948] [2020-12-23 01:38:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:10,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571461948] [2020-12-23 01:38:10,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826910994] [2020-12-23 01:38:10,140 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:10,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:38:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:38:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:38:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:10,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:10,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 01:38:10,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174522891] [2020-12-23 01:38:10,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:38:10,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:38:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:38:10,260 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 7 states. [2020-12-23 01:38:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:10,300 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 01:38:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:38:10,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 01:38:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:10,301 INFO L225 Difference]: With dead ends: 22 [2020-12-23 01:38:10,302 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:38:10,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:38:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:38:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-23 01:38:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:38:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 01:38:10,310 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2020-12-23 01:38:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:10,312 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 01:38:10,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:38:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 01:38:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:38:10,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:10,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:10,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:10,525 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2020-12-23 01:38:10,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:10,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452667464] [2020-12-23 01:38:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:10,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452667464] [2020-12-23 01:38:10,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894078605] [2020-12-23 01:38:10,660 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:10,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:38:10,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:38:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:38:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:10,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:10,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 01:38:10,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120449228] [2020-12-23 01:38:10,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:38:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:38:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:38:10,820 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2020-12-23 01:38:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:10,903 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-23 01:38:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:38:10,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 01:38:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:10,906 INFO L225 Difference]: With dead ends: 25 [2020-12-23 01:38:10,906 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 01:38:10,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:38:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 01:38:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-23 01:38:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 01:38:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-23 01:38:10,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2020-12-23 01:38:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:10,915 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-23 01:38:10,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:38:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-23 01:38:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:38:10,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:10,916 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:11,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:11,131 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2020-12-23 01:38:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886006384] [2020-12-23 01:38:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:11,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886006384] [2020-12-23 01:38:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713664517] [2020-12-23 01:38:11,243 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:11,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:38:11,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:38:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:38:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-23 01:38:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744269443] [2020-12-23 01:38:11,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:38:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:38:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:38:11,425 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2020-12-23 01:38:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:11,505 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 01:38:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:38:11,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-23 01:38:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:11,506 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:38:11,506 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 01:38:11,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:38:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 01:38:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 01:38:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:38:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-23 01:38:11,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2020-12-23 01:38:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:11,512 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-23 01:38:11,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:38:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-23 01:38:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:38:11,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:11,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:11,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:11,728 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -133759111, now seen corresponding path program 5 times [2020-12-23 01:38:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:11,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525864721] [2020-12-23 01:38:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:11,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525864721] [2020-12-23 01:38:11,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577954388] [2020-12-23 01:38:11,869 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:11,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:38:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:38:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:38:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:12,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:12,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-23 01:38:12,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055846148] [2020-12-23 01:38:12,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:38:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:12,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:38:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:38:12,073 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 13 states. [2020-12-23 01:38:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:12,208 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-12-23 01:38:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:38:12,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-23 01:38:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:12,212 INFO L225 Difference]: With dead ends: 31 [2020-12-23 01:38:12,212 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 01:38:12,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:38:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 01:38:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-23 01:38:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 01:38:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-23 01:38:12,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2020-12-23 01:38:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:12,233 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-23 01:38:12,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:38:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-23 01:38:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:38:12,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:12,234 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:12,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 01:38:12,442 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 6 times [2020-12-23 01:38:12,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:12,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505570342] [2020-12-23 01:38:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505570342] [2020-12-23 01:38:12,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713510926] [2020-12-23 01:38:12,612 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:12,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:38:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:38:12,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:38:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:13,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:13,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 01:38:13,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082141608] [2020-12-23 01:38:13,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:38:13,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:13,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:38:13,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:38:13,003 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 15 states. [2020-12-23 01:38:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:13,147 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-23 01:38:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:38:13,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-23 01:38:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:13,148 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:38:13,148 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 01:38:13,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:38:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 01:38:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 01:38:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:38:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-23 01:38:13,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 24 [2020-12-23 01:38:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:13,154 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-23 01:38:13,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:38:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-23 01:38:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:38:13,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:13,155 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:13,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:13,363 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 387561689, now seen corresponding path program 7 times [2020-12-23 01:38:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:13,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892070371] [2020-12-23 01:38:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892070371] [2020-12-23 01:38:13,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830365549] [2020-12-23 01:38:13,617 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:38:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:38:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:38:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:38:14,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:38:14,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-23 01:38:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833103255] [2020-12-23 01:38:14,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:38:14,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:38:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:38:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:38:14,100 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2020-12-23 01:38:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:38:14,257 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-23 01:38:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:38:14,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-12-23 01:38:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:38:14,258 INFO L225 Difference]: With dead ends: 37 [2020-12-23 01:38:14,258 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 01:38:14,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:38:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 01:38:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-12-23 01:38:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 01:38:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-23 01:38:14,263 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 27 [2020-12-23 01:38:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:38:14,263 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-23 01:38:14,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:38:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-23 01:38:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 01:38:14,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:38:14,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 01:38:14,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:38:14,479 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:38:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:38:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 8 times [2020-12-23 01:38:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:38:14,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695581261] [2020-12-23 01:38:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:38:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:38:14,536 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:38:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:38:14,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:38:14,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:38:14,608 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:38:14,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 01:38:14,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:38:14 BoogieIcfgContainer [2020-12-23 01:38:14,662 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:38:14,663 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:38:14,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:38:14,663 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:38:14,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:38:08" (3/4) ... [2020-12-23 01:38:14,667 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 01:38:14,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:38:14,670 INFO L168 Benchmark]: Toolchain (without parser) took 6897.93 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.1 MB in the beginning and 91.2 MB in the end (delta: 34.9 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,674 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:38:14,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.56 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.79 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,677 INFO L168 Benchmark]: Boogie Preprocessor took 25.23 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,678 INFO L168 Benchmark]: RCFGBuilder took 475.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 101.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,681 INFO L168 Benchmark]: TraceAbstraction took 6076.27 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 41.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:38:14,682 INFO L168 Benchmark]: Witness Printer took 4.75 ms. Allocated memory is still 181.4 MB. Free memory was 91.7 MB in the beginning and 91.2 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:38:14,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.56 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.79 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.23 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 475.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 101.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6076.27 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 41.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.75 ms. Allocated memory is still 181.4 MB. Free memory was 91.7 MB in the beginning and 91.2 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 23, overapproximation of bitwiseAnd at line 24. Possible FailurePath: [L16] unsigned char x = __VERIFIER_nondet_uchar(); [L17] unsigned char y; [L18] unsigned char c; [L20] y = 0 [L21] c = 0 [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND TRUE c < (unsigned char)8 [L23] unsigned char i = ((unsigned char)1) << c; [L24] unsigned char bit = x & i; [L25] COND FALSE !(bit != (unsigned char)0) [L28] c = c + ((unsigned char)1) [L22] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 134 SDslu, 640 SDs, 0 SdLazy, 609 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 248 ConstructedInterpolants, 0 QuantifiedInterpolants, 25750 SizeOfPredicates, 8 NumberOfNonLiveVariables, 511 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...