/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:13:22,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:13:22,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:13:22,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 23:13:22,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 23:13:22,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 23:13:22,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 23:13:22,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 23:13:22,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 23:13:22,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 23:13:22,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 23:13:22,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 23:13:22,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:13:22,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:13:22,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:13:22,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:13:22,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:13:22,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:13:22,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:13:22,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:13:22,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:13:22,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:13:22,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:13:22,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:13:22,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:13:22,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:13:22,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:13:22,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:13:22,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:13:22,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:13:22,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:13:22,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:13:22,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:13:22,288 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:13:22,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:13:22,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:13:22,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:13:22,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:13:22,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:13:22,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:13:22,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:13:22,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:13:22,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:13:22,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:13:22,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:13:22,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:13:22,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:13:22,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:13:22,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:13:22,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:13:22,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:13:22,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:13:22,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:13:22,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:13:22,293 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:13:22,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:13:22,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:13:22,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:13:22,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:13:22,716 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:13:22,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-21 23:13:22,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5791e5a/008ee65f773c43c88dd06ef256d4d575/FLAG3a3661869 [2020-12-21 23:13:23,416 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:13:23,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-21 23:13:23,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5791e5a/008ee65f773c43c88dd06ef256d4d575/FLAG3a3661869 [2020-12-21 23:13:23,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5791e5a/008ee65f773c43c88dd06ef256d4d575 [2020-12-21 23:13:23,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:13:23,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:13:23,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:13:23,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:13:23,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:13:23,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:13:23" (1/1) ... [2020-12-21 23:13:23,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ced75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:23, skipping insertion in model container [2020-12-21 23:13:23,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:13:23" (1/1) ... [2020-12-21 23:13:23,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:13:23,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:13:23,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-21 23:13:24,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:13:24,012 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:13:24,029 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-21 23:13:24,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:13:24,071 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:13:24,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24 WrapperNode [2020-12-21 23:13:24,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:13:24,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:13:24,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:13:24,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:13:24,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:13:24,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:13:24,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:13:24,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:13:24,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... [2020-12-21 23:13:24,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:13:24,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:13:24,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:13:24,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:13:24,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:13:24,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:13:24,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:13:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:13:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:13:24,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:13:24,748 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-21 23:13:24,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:24 BoogieIcfgContainer [2020-12-21 23:13:24,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:13:24,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:13:24,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:13:24,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:13:24,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:13:23" (1/3) ... [2020-12-21 23:13:24,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503c8e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:13:24, skipping insertion in model container [2020-12-21 23:13:24,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:13:24" (2/3) ... [2020-12-21 23:13:24,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503c8e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:13:24, skipping insertion in model container [2020-12-21 23:13:24,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:24" (3/3) ... [2020-12-21 23:13:24,774 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2020-12-21 23:13:24,799 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:13:24,812 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:13:24,862 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:13:24,901 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:13:24,901 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:13:24,901 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:13:24,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:13:24,902 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:13:24,902 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:13:24,902 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:13:24,902 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:13:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-21 23:13:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-21 23:13:24,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:24,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-21 23:13:24,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-12-21 23:13:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:24,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403544710] [2020-12-21 23:13:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:25,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403544710] [2020-12-21 23:13:25,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:13:25,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:13:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487625277] [2020-12-21 23:13:25,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 23:13:25,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 23:13:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 23:13:25,140 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-21 23:13:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:25,158 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-21 23:13:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 23:13:25,160 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-21 23:13:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:25,169 INFO L225 Difference]: With dead ends: 21 [2020-12-21 23:13:25,170 INFO L226 Difference]: Without dead ends: 9 [2020-12-21 23:13:25,173 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 [2020-12-21 23:13:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-21 23:13:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-21 23:13:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-21 23:13:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-21 23:13:25,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-21 23:13:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:25,208 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-21 23:13:25,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 23:13:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-21 23:13:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-21 23:13:25,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:25,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-21 23:13:25,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:13:25,210 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-12-21 23:13:25,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:25,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693588298] [2020-12-21 23:13:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693588298] [2020-12-21 23:13:25,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:13:25,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:13:25,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770106823] [2020-12-21 23:13:25,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:13:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:13:25,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:13:25,337 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-12-21 23:13:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:25,384 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-21 23:13:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:13:25,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-21 23:13:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:25,386 INFO L225 Difference]: With dead ends: 16 [2020-12-21 23:13:25,386 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 23:13:25,388 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 [2020-12-21 23:13:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 23:13:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-21 23:13:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-21 23:13:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-21 23:13:25,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-21 23:13:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:25,395 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-21 23:13:25,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:13:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-21 23:13:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 23:13:25,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:25,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:25,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:13:25,398 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:25,400 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2020-12-21 23:13:25,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:25,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882172749] [2020-12-21 23:13:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882172749] [2020-12-21 23:13:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797846815] [2020-12-21 23:13:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:13:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:25,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 23:13:25,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341856547] [2020-12-21 23:13:25,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:13:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:13:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:13:25,778 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-21 23:13:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:25,842 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-21 23:13:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:13:25,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-21 23:13:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:25,846 INFO L225 Difference]: With dead ends: 19 [2020-12-21 23:13:25,847 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 23:13:25,848 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 [2020-12-21 23:13:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 23:13:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-12-21 23:13:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 23:13:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-21 23:13:25,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-21 23:13:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:25,863 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-21 23:13:25,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:13:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-21 23:13:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 23:13:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:25,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:26,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 23:13:26,079 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2020-12-21 23:13:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:26,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408350242] [2020-12-21 23:13:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:26,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408350242] [2020-12-21 23:13:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51117682] [2020-12-21 23:13:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:26,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 23:13:26,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 23:13:26,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:26,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:26,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-21 23:13:26,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725655565] [2020-12-21 23:13:26,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:13:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:13:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:13:26,282 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 7 states. [2020-12-21 23:13:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:26,320 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-21 23:13:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:13:26,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 23:13:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:26,322 INFO L225 Difference]: With dead ends: 22 [2020-12-21 23:13:26,322 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 23:13:26,323 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 [2020-12-21 23:13:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 23:13:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-21 23:13:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 23:13:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 23:13:26,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2020-12-21 23:13:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:26,328 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 23:13:26,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:13:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 23:13:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 23:13:26,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:26,329 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:26,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:26,546 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:26,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2020-12-21 23:13:26,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:26,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110838785] [2020-12-21 23:13:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:26,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110838785] [2020-12-21 23:13:26,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741603056] [2020-12-21 23:13:26,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:26,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 23:13:26,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 23:13:26,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:26,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:26,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-21 23:13:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31875983] [2020-12-21 23:13:26,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 23:13:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 23:13:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:13:26,794 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2020-12-21 23:13:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:26,906 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-21 23:13:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:13:26,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-21 23:13:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:26,908 INFO L225 Difference]: With dead ends: 25 [2020-12-21 23:13:26,908 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 23:13:26,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:13:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 23:13:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-12-21 23:13:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 23:13:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 23:13:26,923 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2020-12-21 23:13:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:26,923 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 23:13:26,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 23:13:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 23:13:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 23:13:26,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:26,927 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:27,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:27,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2020-12-21 23:13:27,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:27,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561425865] [2020-12-21 23:13:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561425865] [2020-12-21 23:13:27,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995483529] [2020-12-21 23:13:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:13:27,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 23:13:27,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 23:13:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:27,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:27,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-21 23:13:27,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531145402] [2020-12-21 23:13:27,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 23:13:27,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 23:13:27,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:13:27,534 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2020-12-21 23:13:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:27,629 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-21 23:13:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:13:27,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-21 23:13:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:27,631 INFO L225 Difference]: With dead ends: 28 [2020-12-21 23:13:27,631 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 23:13:27,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:13:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 23:13:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-21 23:13:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 23:13:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 23:13:27,637 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2020-12-21 23:13:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:27,637 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 23:13:27,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 23:13:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 23:13:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 23:13:27,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:27,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:27,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:27,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:27,844 INFO L82 PathProgramCache]: Analyzing trace with hash -133759111, now seen corresponding path program 5 times [2020-12-21 23:13:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:27,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065452690] [2020-12-21 23:13:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065452690] [2020-12-21 23:13:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346515234] [2020-12-21 23:13:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:13:28,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 23:13:28,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 23:13:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:28,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:28,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-21 23:13:28,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236924965] [2020-12-21 23:13:28,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 23:13:28,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 23:13:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:13:28,260 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 13 states. [2020-12-21 23:13:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:28,363 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-12-21 23:13:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:13:28,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-21 23:13:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:28,365 INFO L225 Difference]: With dead ends: 31 [2020-12-21 23:13:28,365 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 23:13:28,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-21 23:13:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 23:13:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-21 23:13:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 23:13:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-21 23:13:28,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2020-12-21 23:13:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-21 23:13:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 23:13:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-21 23:13:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 23:13:28,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:28,398 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:28,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 23:13:28,613 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 6 times [2020-12-21 23:13:28,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:28,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099001447] [2020-12-21 23:13:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:28,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099001447] [2020-12-21 23:13:28,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546002428] [2020-12-21 23:13:28,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:13:28,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 23:13:28,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 23:13:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 23:13:28,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:29,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-21 23:13:29,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746506768] [2020-12-21 23:13:29,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 23:13:29,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 23:13:29,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-21 23:13:29,103 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 15 states. [2020-12-21 23:13:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:29,216 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-21 23:13:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 23:13:29,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-21 23:13:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:29,217 INFO L225 Difference]: With dead ends: 34 [2020-12-21 23:13:29,217 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 23:13:29,218 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 [2020-12-21 23:13:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 23:13:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-21 23:13:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 23:13:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-21 23:13:29,223 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 24 [2020-12-21 23:13:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:29,224 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-21 23:13:29,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 23:13:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-21 23:13:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 23:13:29,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:29,225 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:29,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:29,430 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash 387561689, now seen corresponding path program 7 times [2020-12-21 23:13:29,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:29,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258242653] [2020-12-21 23:13:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258242653] [2020-12-21 23:13:29,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222214369] [2020-12-21 23:13:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 23:13:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:13:29,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 23:13:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:13:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:13:29,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 23:13:29,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-21 23:13:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443603010] [2020-12-21 23:13:29,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 23:13:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:13:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 23:13:29,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:13:29,914 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2020-12-21 23:13:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:13:30,056 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-21 23:13:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 23:13:30,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-12-21 23:13:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:13:30,061 INFO L225 Difference]: With dead ends: 37 [2020-12-21 23:13:30,062 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 23:13:30,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-21 23:13:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 23:13:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-12-21 23:13:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 23:13:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-21 23:13:30,081 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 27 [2020-12-21 23:13:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:13:30,082 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-21 23:13:30,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 23:13:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-21 23:13:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 23:13:30,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:13:30,085 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-21 23:13:30,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:13:30,300 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:13:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:13:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 8 times [2020-12-21 23:13:30,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:13:30,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516926310] [2020-12-21 23:13:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:13:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:13:30,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:13:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:13:30,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:13:30,400 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 23:13:30,400 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 23:13:30,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:13:30,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:13:30 BoogieIcfgContainer [2020-12-21 23:13:30,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 23:13:30,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 23:13:30,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 23:13:30,476 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 23:13:30,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:13:24" (3/4) ... [2020-12-21 23:13:30,480 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-21 23:13:30,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 23:13:30,483 INFO L168 Benchmark]: Toolchain (without parser) took 6693.72 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.8 MB in the beginning and 119.1 MB in the end (delta: 7.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,483 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:13:30,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,485 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.33 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,486 INFO L168 Benchmark]: Boogie Preprocessor took 61.18 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.4 MB in the end (delta: 926.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,486 INFO L168 Benchmark]: RCFGBuilder took 557.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 103.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,487 INFO L168 Benchmark]: TraceAbstraction took 5719.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.7 MB in the beginning and 119.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,488 INFO L168 Benchmark]: Witness Printer took 5.06 ms. Allocated memory is still 181.4 MB. Free memory was 119.6 MB in the beginning and 119.1 MB in the end (delta: 526.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:13:30,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.33 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.18 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.4 MB in the end (delta: 926.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 557.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 103.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5719.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 102.7 MB in the beginning and 119.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Witness Printer took 5.06 ms. Allocated memory is still 181.4 MB. Free memory was 119.6 MB in the beginning and 119.1 MB in the end (delta: 526.0 kB). Peak memory consumption was 1.0 MB. 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 24, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L16] unsigned char x; [L17] unsigned char y; [L18] unsigned char c; [L20] x = 37 [L21] y = 0 [L22] c = 0 [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] 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: 5.5s, 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, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 248 ConstructedInterpolants, 0 QuantifiedInterpolants, 25750 SizeOfPredicates, 7 NumberOfNonLiveVariables, 455 ConjunctsInSsa, 98 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...