/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/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:47:53,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:47:53,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:47:53,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:47:53,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:47:53,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:47:53,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:47:53,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:47:53,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:47:53,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:47:53,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:47:53,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:47:53,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:47:53,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:47:53,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:47:53,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:47:53,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:47:53,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:47:53,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:47:53,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:47:53,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:47:53,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:47:53,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:47:53,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:47:53,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:47:53,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:47:53,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:47:53,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:47:53,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:47:53,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:47:53,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:47:53,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:47:53,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:47:53,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:47:53,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:47:53,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:47:53,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:47:53,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:47:53,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:47:53,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:47:53,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:47:53,825 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:47:53,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:47:53,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:47:53,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:47:53,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:47:53,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:47:53,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:47:53,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:47:53,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:47:53,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:47:53,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:47:53,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:47:53,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:47:53,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:47:53,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:47:53,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:47:53,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:47:53,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:47:53,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:47:53,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:47:53,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:47:53,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:47:54,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:47:54,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:47:54,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:47:54,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:47:54,330 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:47:54,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-22 03:47:54,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de550aa7d/101919da502740af98dbd8dff17b844c/FLAG22d9fef29 [2020-12-22 03:47:55,056 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:47:55,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-22 03:47:55,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de550aa7d/101919da502740af98dbd8dff17b844c/FLAG22d9fef29 [2020-12-22 03:47:55,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de550aa7d/101919da502740af98dbd8dff17b844c [2020-12-22 03:47:55,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:47:55,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:47:55,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:47:55,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:47:55,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:47:55,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:47:55" (1/1) ... [2020-12-22 03:47:55,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e0259c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:55, skipping insertion in model container [2020-12-22 03:47:55,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:47:55" (1/1) ... [2020-12-22 03:47:55,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:47:55,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:47:55,946 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/list-properties/list_flag-1.i[23375,23388] [2020-12-22 03:47:55,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:47:55,961 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:47:56,001 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/list-properties/list_flag-1.i[23375,23388] [2020-12-22 03:47:56,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:47:56,094 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:47:56,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56 WrapperNode [2020-12-22 03:47:56,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:47:56,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:47:56,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:47:56,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:47:56,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:47:56,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:47:56,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:47:56,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:47:56,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (1/1) ... [2020-12-22 03:47:56,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:47:56,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:47:56,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:47:56,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:47:56,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (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 [2020-12-22 03:47:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:47:56,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:47:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:47:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:47:56,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:47:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:47:56,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:47:56,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:47:56,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:47:56,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:47:56,895 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 03:47:56,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:47:56 BoogieIcfgContainer [2020-12-22 03:47:56,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:47:56,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:47:56,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:47:56,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:47:56,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:47:55" (1/3) ... [2020-12-22 03:47:56,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:47:56, skipping insertion in model container [2020-12-22 03:47:56,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:47:56" (2/3) ... [2020-12-22 03:47:56,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:47:56, skipping insertion in model container [2020-12-22 03:47:56,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:47:56" (3/3) ... [2020-12-22 03:47:56,911 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-12-22 03:47:56,918 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:47:56,923 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:47:56,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:47:56,987 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:47:56,987 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:47:56,987 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:47:56,988 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:47:56,988 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:47:56,988 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:47:56,988 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:47:56,988 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:47:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 03:47:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:47:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:57,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:57,013 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1941242346, now seen corresponding path program 1 times [2020-12-22 03:47:57,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:57,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649742015] [2020-12-22 03:47:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:47:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:47:57,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649742015] [2020-12-22 03:47:57,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:47:57,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:47:57,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941562968] [2020-12-22 03:47:57,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:47:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:47:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:47:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:47:57,216 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 03:47:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:47:57,235 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2020-12-22 03:47:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:47:57,237 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 03:47:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:47:57,246 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:47:57,246 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 03:47:57,249 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 [2020-12-22 03:47:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 03:47:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 03:47:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:47:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-22 03:47:57,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-22 03:47:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:47:57,285 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-22 03:47:57,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:47:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-22 03:47:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:47:57,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:57,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:57,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:47:57,287 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1795403316, now seen corresponding path program 1 times [2020-12-22 03:47:57,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:57,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944072329] [2020-12-22 03:47:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:47:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:47:57,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944072329] [2020-12-22 03:47:57,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:47:57,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:47:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709693095] [2020-12-22 03:47:57,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:47:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:47:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:47:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:47:57,430 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-12-22 03:47:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:47:57,568 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-12-22 03:47:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:47:57,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 03:47:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:47:57,570 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:47:57,570 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 03:47:57,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:47:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 03:47:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-12-22 03:47:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:47:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-22 03:47:57,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-22 03:47:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:47:57,578 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-22 03:47:57,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:47:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-22 03:47:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:47:57,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:57,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:57,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:47:57,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1242942375, now seen corresponding path program 1 times [2020-12-22 03:47:57,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:57,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125830650] [2020-12-22 03:47:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:47:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:47:57,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125830650] [2020-12-22 03:47:57,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:47:57,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:47:57,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793217178] [2020-12-22 03:47:57,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:47:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:47:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:47:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:47:57,677 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-22 03:47:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:47:57,787 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-22 03:47:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:47:57,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:47:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:47:57,789 INFO L225 Difference]: With dead ends: 46 [2020-12-22 03:47:57,789 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 03:47:57,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:47:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 03:47:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-12-22 03:47:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:47:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-22 03:47:57,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2020-12-22 03:47:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:47:57,797 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-22 03:47:57,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:47:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-22 03:47:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:47:57,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:57,798 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:57,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:47:57,799 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash -799146, now seen corresponding path program 1 times [2020-12-22 03:47:57,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:57,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857878360] [2020-12-22 03:47:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:47:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:47:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857878360] [2020-12-22 03:47:57,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:47:57,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:47:57,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143032124] [2020-12-22 03:47:57,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:47:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:47:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:47:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:47:57,869 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-12-22 03:47:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:47:57,964 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-22 03:47:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:47:57,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:47:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:47:57,966 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:47:57,966 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 03:47:57,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:47:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 03:47:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2020-12-22 03:47:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:47:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-22 03:47:57,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-12-22 03:47:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:47:57,978 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-22 03:47:57,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:47:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-22 03:47:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:47:57,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:57,981 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:57,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:47:57,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash -172690303, now seen corresponding path program 1 times [2020-12-22 03:47:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856668233] [2020-12-22 03:47:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:47:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:47:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856668233] [2020-12-22 03:47:58,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:47:58,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:47:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388160151] [2020-12-22 03:47:58,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:47:58,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:47:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:47:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:47:58,117 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-22 03:47:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:47:58,146 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-22 03:47:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:47:58,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 03:47:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:47:58,153 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:47:58,156 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 03:47:58,157 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 [2020-12-22 03:47:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 03:47:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-12-22 03:47:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:47:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-22 03:47:58,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-12-22 03:47:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:47:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-22 03:47:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:47:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-22 03:47:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:47:58,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:47:58,165 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:47:58,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:47:58,165 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:47:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:47:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -616427248, now seen corresponding path program 1 times [2020-12-22 03:47:58,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:47:58,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635995539] [2020-12-22 03:47:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:47:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:47:58,195 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:47:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:47:58,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:47:58,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:47:58,251 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:47:58,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:47:58,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:47:58 BoogieIcfgContainer [2020-12-22 03:47:58,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:47:58,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:47:58,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:47:58,298 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:47:58,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:47:56" (3/4) ... [2020-12-22 03:47:58,302 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:47:58,366 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-properties/list_flag-1.i-witness.graphml [2020-12-22 03:47:58,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:47:58,369 INFO L168 Benchmark]: Toolchain (without parser) took 2994.13 ms. Allocated memory is still 161.5 MB. Free memory was 135.0 MB in the beginning and 127.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,369 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:47:58,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.17 ms. Allocated memory is still 161.5 MB. Free memory was 134.8 MB in the beginning and 143.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.87 ms. Allocated memory is still 161.5 MB. Free memory was 143.5 MB in the beginning and 141.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,372 INFO L168 Benchmark]: Boogie Preprocessor took 58.03 ms. Allocated memory is still 161.5 MB. Free memory was 141.7 MB in the beginning and 140.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,373 INFO L168 Benchmark]: RCFGBuilder took 626.52 ms. Allocated memory is still 161.5 MB. Free memory was 140.1 MB in the beginning and 122.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,373 INFO L168 Benchmark]: TraceAbstraction took 1395.41 ms. Allocated memory is still 161.5 MB. Free memory was 121.8 MB in the beginning and 129.6 MB in the end (delta: -7.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:47:58,374 INFO L168 Benchmark]: Witness Printer took 69.01 ms. Allocated memory is still 161.5 MB. Free memory was 129.6 MB in the beginning and 127.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:47:58,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 717.17 ms. Allocated memory is still 161.5 MB. Free memory was 134.8 MB in the beginning and 143.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 115.87 ms. Allocated memory is still 161.5 MB. Free memory was 143.5 MB in the beginning and 141.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.03 ms. Allocated memory is still 161.5 MB. Free memory was 141.7 MB in the beginning and 140.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 626.52 ms. Allocated memory is still 161.5 MB. Free memory was 140.1 MB in the beginning and 122.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1395.41 ms. Allocated memory is still 161.5 MB. Free memory was 121.8 MB in the beginning and 129.6 MB in the end (delta: -7.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 69.01 ms. Allocated memory is still 161.5 MB. Free memory was 129.6 MB in the beginning and 127.0 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: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 71 SDslu, 133 SDs, 0 SdLazy, 138 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 2762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...