/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:46:21,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:21,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:46:21,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:46:21,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:46:21,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:46:21,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:46:21,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:46:21,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:46:21,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:46:21,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:46:21,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:46:21,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:46:21,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:46:21,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:46:21,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:46:21,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:46:21,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:46:21,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:21,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:21,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:21,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:21,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:21,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:21,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:21,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:21,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:21,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:21,885 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 06:46:21,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:21,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:21,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:21,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:21,938 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:21,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:21,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:21,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:21,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:21,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:21,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:21,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:21,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:21,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:21,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:21,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:21,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:21,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:21,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:21,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:21,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:21,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:21,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:21,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:21,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:21,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:22,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:22,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:22,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:22,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:22,401 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:22,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-1.i [2020-12-23 06:46:22,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5b6fcb77/fb52c353dbc146a2bf870555840ab62b/FLAG2f71f1d4d [2020-12-23 06:46:23,027 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:23,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum04-1.i [2020-12-23 06:46:23,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5b6fcb77/fb52c353dbc146a2bf870555840ab62b/FLAG2f71f1d4d [2020-12-23 06:46:23,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e5b6fcb77/fb52c353dbc146a2bf870555840ab62b [2020-12-23 06:46:23,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:23,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:23,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:23,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:23,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:23,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42289f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23, skipping insertion in model container [2020-12-23 06:46:23,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:23,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:23,652 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/loops/sum04-1.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:23,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:23,678 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:23,694 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/loops/sum04-1.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:23,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:23,714 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:23,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23 WrapperNode [2020-12-23 06:46:23,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:23,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:23,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:23,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:23,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:23,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:23,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:23,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:23,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (1/1) ... [2020-12-23 06:46:23,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:23,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:23,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:23,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:23,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (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 06:46:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:24,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:24,265 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:46:24,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:24 BoogieIcfgContainer [2020-12-23 06:46:24,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:24,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:24,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:24,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:24,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:23" (1/3) ... [2020-12-23 06:46:24,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df25d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:24, skipping insertion in model container [2020-12-23 06:46:24,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:23" (2/3) ... [2020-12-23 06:46:24,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df25d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:24, skipping insertion in model container [2020-12-23 06:46:24,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:24" (3/3) ... [2020-12-23 06:46:24,281 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-12-23 06:46:24,290 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:24,295 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:24,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:24,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:24,371 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:24,371 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:24,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:24,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:24,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:24,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:24,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:46:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:46:24,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:24,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:46:24,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-23 06:46:24,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117269306] [2020-12-23 06:46:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:24,654 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 06:46:24,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117269306] [2020-12-23 06:46:24,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:24,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:46:24,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660741020] [2020-12-23 06:46:24,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:46:24,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:46:24,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:24,690 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 06:46:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:24,707 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-23 06:46:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:46:24,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:46:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:24,735 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:46:24,735 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:46:24,742 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 06:46:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:46:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:46:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:46:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-23 06:46:24,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-23 06:46:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:24,787 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-23 06:46:24,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:46:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-23 06:46:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:46:24,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:24,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:46:24,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:24,790 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2020-12-23 06:46:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654319708] [2020-12-23 06:46:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:24,873 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 06:46:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654319708] [2020-12-23 06:46:24,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:24,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:46:24,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206400355] [2020-12-23 06:46:24,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:46:24,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:46:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:46:24,877 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-12-23 06:46:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:24,905 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-12-23 06:46:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:46:24,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:46:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:24,906 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:46:24,907 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:46:24,908 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 06:46:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:46:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-23 06:46:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:46:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-23 06:46:24,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2020-12-23 06:46:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-23 06:46:24,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:46:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-23 06:46:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:46:24,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:24,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:24,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:24,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2020-12-23 06:46:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:24,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59180771] [2020-12-23 06:46:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:24,953 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 06:46:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59180771] [2020-12-23 06:46:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190805864] [2020-12-23 06:46:24,955 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 06:46:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:46:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:25,098 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 06:46:25,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:46:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630314676] [2020-12-23 06:46:25,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:25,101 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-12-23 06:46:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:25,136 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 06:46:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:25,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 06:46:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:25,138 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:46:25,138 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:46:25,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:46:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 06:46:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:46:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:46:25,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-23 06:46:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:25,143 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:46:25,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:46:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:46:25,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:25,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:25,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:25,360 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 951667218, now seen corresponding path program 2 times [2020-12-23 06:46:25,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:25,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138293065] [2020-12-23 06:46:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:46:25,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138293065] [2020-12-23 06:46:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:25,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:46:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346555258] [2020-12-23 06:46:25,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:46:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:46:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:46:25,461 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-12-23 06:46:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:25,491 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-23 06:46:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:25,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 06:46:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:25,496 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:46:25,496 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:46:25,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:46:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:46:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-23 06:46:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:46:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 06:46:25,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-12-23 06:46:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:25,508 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 06:46:25,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:46:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 06:46:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:46:25,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:25,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:25,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:46:25,512 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1635223064, now seen corresponding path program 1 times [2020-12-23 06:46:25,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:25,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583885661] [2020-12-23 06:46:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:25,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583885661] [2020-12-23 06:46:25,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258957561] [2020-12-23 06:46:25,646 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 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 06:46:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:46:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:46:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832679738] [2020-12-23 06:46:25,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:46:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:46:25,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:46:25,809 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 06:46:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:25,872 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 06:46:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:25,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 06:46:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:25,877 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:46:25,877 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:46:25,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:46:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:46:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:46:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:46:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 06:46:25,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-12-23 06:46:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:25,887 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 06:46:25,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:46:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 06:46:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:46:25,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:25,890 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:26,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:26,104 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1967544752, now seen corresponding path program 2 times [2020-12-23 06:46:26,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:26,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992882001] [2020-12-23 06:46:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:26,234 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 06:46:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992882001] [2020-12-23 06:46:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891277336] [2020-12-23 06:46:26,236 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 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 06:46:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:46:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:26,352 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 06:46:26,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:26,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:46:26,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397063442] [2020-12-23 06:46:26,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:46:26,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:26,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:46:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:26,356 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2020-12-23 06:46:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:26,397 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 06:46:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:46:26,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-23 06:46:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:26,400 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:46:26,401 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:46:26,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:46:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 06:46:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:46:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 06:46:26,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2020-12-23 06:46:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:26,408 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 06:46:26,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:46:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 06:46:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:46:26,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:26,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:26,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:26,624 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash -110765798, now seen corresponding path program 3 times [2020-12-23 06:46:26,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:26,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824365649] [2020-12-23 06:46:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:26,717 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 06:46:26,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824365649] [2020-12-23 06:46:26,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591555663] [2020-12-23 06:46:26,719 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 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 06:46:26,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:46:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:46:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 06:46:26,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:26,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-12-23 06:46:26,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024930107] [2020-12-23 06:46:26,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:46:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:46:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:26,834 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-23 06:46:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:26,881 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-12-23 06:46:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:46:26,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 06:46:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:26,882 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:46:26,883 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:46:26,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:46:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-23 06:46:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:46:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 06:46:26,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2020-12-23 06:46:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:26,889 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 06:46:26,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:46:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 06:46:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:46:26,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:26,891 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:27,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:27,107 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:27,109 INFO L82 PathProgramCache]: Analyzing trace with hash 307247632, now seen corresponding path program 4 times [2020-12-23 06:46:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:27,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662700367] [2020-12-23 06:46:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:27,234 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 06:46:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662700367] [2020-12-23 06:46:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465543145] [2020-12-23 06:46:27,235 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 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 06:46:27,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:46:27,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:46:27,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:27,348 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 06:46:27,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:27,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:46:27,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507127019] [2020-12-23 06:46:27,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:46:27,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:27,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:46:27,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:46:27,351 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-12-23 06:46:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:27,403 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 06:46:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:46:27,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-12-23 06:46:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:27,406 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:46:27,407 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:46:27,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:46:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:46:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 06:46:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:46:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 06:46:27,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2020-12-23 06:46:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:27,413 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 06:46:27,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:46:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 06:46:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:46:27,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:27,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:27,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:27,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2059817638, now seen corresponding path program 5 times [2020-12-23 06:46:27,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:27,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683054623] [2020-12-23 06:46:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:27,755 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 06:46:27,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683054623] [2020-12-23 06:46:27,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839093842] [2020-12-23 06:46:27,756 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 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 06:46:27,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 06:46:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:46:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 06:46:27,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:27,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2020-12-23 06:46:27,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131449491] [2020-12-23 06:46:27,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:46:27,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:46:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:46:27,867 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 10 states. [2020-12-23 06:46:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:27,920 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-23 06:46:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:46:27,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-23 06:46:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:27,922 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:46:27,922 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:46:27,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:46:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:46:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:46:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:46:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 06:46:27,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 27 [2020-12-23 06:46:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:27,928 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 06:46:27,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:46:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 06:46:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:46:27,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:27,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:28,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:28,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash -233243184, now seen corresponding path program 6 times [2020-12-23 06:46:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:28,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717007634] [2020-12-23 06:46:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:28,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:28,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:28,200 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:46:28,201 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:46:28,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 06:46:28,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:46:28 BoogieIcfgContainer [2020-12-23 06:46:28,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:46:28,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:46:28,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:46:28,242 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:46:28,243 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:24" (3/4) ... [2020-12-23 06:46:28,245 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:46:28,312 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum04-1.i-witness.graphml [2020-12-23 06:46:28,312 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:46:28,324 INFO L168 Benchmark]: Toolchain (without parser) took 4905.99 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 130.9 MB in the beginning and 84.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 85.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,325 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:46:28,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.52 ms. Allocated memory is still 155.2 MB. Free memory was 130.7 MB in the beginning and 121.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,327 INFO L168 Benchmark]: Boogie Preprocessor took 23.04 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,330 INFO L168 Benchmark]: RCFGBuilder took 487.61 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 108.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,332 INFO L168 Benchmark]: TraceAbstraction took 3971.29 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 107.8 MB in the beginning and 87.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,333 INFO L168 Benchmark]: Witness Printer took 70.88 ms. Allocated memory is still 194.0 MB. Free memory was 87.4 MB in the beginning and 84.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:28,344 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 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.52 ms. Allocated memory is still 155.2 MB. Free memory was 130.7 MB in the beginning and 121.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.04 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 487.61 ms. Allocated memory is still 155.2 MB. Free memory was 118.8 MB in the beginning and 108.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3971.29 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 107.8 MB in the beginning and 87.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. * Witness Printer took 70.88 ms. Allocated memory is still 194.0 MB. Free memory was 87.4 MB in the beginning and 84.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 68 SDslu, 120 SDs, 0 SdLazy, 174 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s 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, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 282 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 237 ConstructedInterpolants, 0 QuantifiedInterpolants, 10573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 323 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 87/387 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...