/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/list-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:26:16,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:26:16,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:26:16,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:26:16,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:26:16,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:26:17,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:26:17,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:26:17,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:26:17,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:26:17,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:26:17,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:26:17,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:26:17,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:26:17,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:26:17,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:26:17,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:26:17,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:26:17,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:26:17,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:26:17,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:26:17,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:26:17,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:26:17,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:26:17,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:26:17,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:26:17,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:26:17,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:26:17,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:26:17,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:26:17,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:26:17,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:26:17,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:26:17,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:26:17,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:26:17,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:26:17,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:26:17,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:26:17,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:26:17,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:26:17,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:26:17,181 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:26:17,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:26:17,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:26:17,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:26:17,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:26:17,182 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:26:17,184 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:26:17,184 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:26:17,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:26:17,185 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:26:17,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:26:17,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:26:17,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:26:17,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:26:17,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:26:17,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:26:17,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:26:17,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:26:17,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:26:17,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:26:17,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:26:17,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:26:17,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:26:17,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:26:17,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:26:17,693 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:26:17,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2020-12-22 19:26:17,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414b34476/3433085545d540c4b9523dc717916f77/FLAGa7aa791e0 [2020-12-22 19:26:18,521 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:26:18,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2020-12-22 19:26:18,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414b34476/3433085545d540c4b9523dc717916f77/FLAGa7aa791e0 [2020-12-22 19:26:18,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/414b34476/3433085545d540c4b9523dc717916f77 [2020-12-22 19:26:18,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:26:18,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:26:18,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:26:18,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:26:18,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:26:18,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:26:18" (1/1) ... [2020-12-22 19:26:18,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3393185b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:18, skipping insertion in model container [2020-12-22 19:26:18,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:26:18" (1/1) ... [2020-12-22 19:26:18,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:26:18,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:26:19,288 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/simple-2.i[23225,23238] [2020-12-22 19:26:19,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:26:19,318 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:26:19,404 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/simple-2.i[23225,23238] [2020-12-22 19:26:19,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:26:19,467 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:26:19,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19 WrapperNode [2020-12-22 19:26:19,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:26:19,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:26:19,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:26:19,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:26:19,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:26:19,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:26:19,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:26:19,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:26:19,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (1/1) ... [2020-12-22 19:26:19,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:26:19,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:26:19,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:26:19,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:26:19,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (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 19:26:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:26:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:26:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:26:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 19:26:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:26:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 19:26:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:26:19,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:26:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:26:20,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:26:20,213 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 19:26:20,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:26:20 BoogieIcfgContainer [2020-12-22 19:26:20,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:26:20,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:26:20,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:26:20,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:26:20,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:26:18" (1/3) ... [2020-12-22 19:26:20,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cf6b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:26:20, skipping insertion in model container [2020-12-22 19:26:20,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:26:19" (2/3) ... [2020-12-22 19:26:20,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cf6b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:26:20, skipping insertion in model container [2020-12-22 19:26:20,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:26:20" (3/3) ... [2020-12-22 19:26:20,242 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-12-22 19:26:20,265 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:26:20,273 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-12-22 19:26:20,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-12-22 19:26:20,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:26:20,329 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:26:20,329 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:26:20,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:26:20,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:26:20,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:26:20,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:26:20,330 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:26:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-12-22 19:26:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:26:20,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:20,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:26:20,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 889599944, now seen corresponding path program 1 times [2020-12-22 19:26:20,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:20,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772058822] [2020-12-22 19:26:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:20,704 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 19:26:20,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772058822] [2020-12-22 19:26:20,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:20,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:26:20,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821534587] [2020-12-22 19:26:20,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 19:26:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 19:26:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 19:26:20,746 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-12-22 19:26:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:20,770 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-12-22 19:26:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 19:26:20,772 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 19:26:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:20,794 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:26:20,794 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 19:26:20,797 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 19:26:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 19:26:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 19:26:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 19:26:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 19:26:20,864 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 6 [2020-12-22 19:26:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:20,864 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 19:26:20,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 19:26:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 19:26:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:26:20,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:20,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:20,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:26:20,866 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769731, now seen corresponding path program 1 times [2020-12-22 19:26:20,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:20,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200072976] [2020-12-22 19:26:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:20,944 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 19:26:20,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200072976] [2020-12-22 19:26:20,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:20,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:26:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639295878] [2020-12-22 19:26:20,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:26:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:26:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:26:20,949 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 4 states. [2020-12-22 19:26:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:21,081 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 19:26:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:26:21,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:26:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:21,083 INFO L225 Difference]: With dead ends: 47 [2020-12-22 19:26:21,083 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:26:21,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:26:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:26:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-22 19:26:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 19:26:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-22 19:26:21,092 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2020-12-22 19:26:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:21,093 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-22 19:26:21,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:26:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-22 19:26:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:26:21,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:21,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:21,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:26:21,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:21,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769732, now seen corresponding path program 1 times [2020-12-22 19:26:21,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:21,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661379509] [2020-12-22 19:26:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:21,180 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 19:26:21,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661379509] [2020-12-22 19:26:21,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:21,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:26:21,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068483781] [2020-12-22 19:26:21,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:26:21,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:26:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:26:21,187 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 4 states. [2020-12-22 19:26:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:21,338 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 19:26:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:26:21,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:26:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:21,340 INFO L225 Difference]: With dead ends: 56 [2020-12-22 19:26:21,340 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 19:26:21,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:26:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 19:26:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-12-22 19:26:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:26:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-22 19:26:21,349 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 7 [2020-12-22 19:26:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:21,349 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-22 19:26:21,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:26:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-22 19:26:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:26:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:21,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:21,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:26:21,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1646105516, now seen corresponding path program 1 times [2020-12-22 19:26:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128104118] [2020-12-22 19:26:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:21,426 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 19:26:21,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128104118] [2020-12-22 19:26:21,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:21,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:26:21,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974805882] [2020-12-22 19:26:21,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:26:21,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:21,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:26:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:26:21,430 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-12-22 19:26:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:21,572 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 19:26:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:26:21,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 19:26:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:21,576 INFO L225 Difference]: With dead ends: 53 [2020-12-22 19:26:21,576 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 19:26:21,577 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 19:26:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 19:26:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-22 19:26:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:26:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-22 19:26:21,595 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2020-12-22 19:26:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:21,596 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-22 19:26:21,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:26:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-22 19:26:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:26:21,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:21,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:21,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:26:21,598 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 510377448, now seen corresponding path program 1 times [2020-12-22 19:26:21,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:21,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741099375] [2020-12-22 19:26:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:21,794 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 19:26:21,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741099375] [2020-12-22 19:26:21,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:21,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 19:26:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127814775] [2020-12-22 19:26:21,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:26:21,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:26:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:26:21,802 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 7 states. [2020-12-22 19:26:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:22,008 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-12-22 19:26:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:26:22,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 19:26:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:22,011 INFO L225 Difference]: With dead ends: 85 [2020-12-22 19:26:22,012 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:26:22,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:26:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:26:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2020-12-22 19:26:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:26:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 19:26:22,028 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 13 [2020-12-22 19:26:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:22,028 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 19:26:22,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:26:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 19:26:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:26:22,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:22,030 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:22,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:26:22,031 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2016970890, now seen corresponding path program 1 times [2020-12-22 19:26:22,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:22,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137774176] [2020-12-22 19:26:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:22,112 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 19:26:22,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137774176] [2020-12-22 19:26:22,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:22,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:26:22,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774126096] [2020-12-22 19:26:22,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:26:22,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:22,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:26:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:26:22,115 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 6 states. [2020-12-22 19:26:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:22,265 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-12-22 19:26:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:26:22,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 19:26:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:22,267 INFO L225 Difference]: With dead ends: 64 [2020-12-22 19:26:22,267 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 19:26:22,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:26:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 19:26:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2020-12-22 19:26:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:26:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-12-22 19:26:22,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2020-12-22 19:26:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:22,273 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-12-22 19:26:22,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:26:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-12-22 19:26:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 19:26:22,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:22,274 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:22,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:26:22,275 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2016970889, now seen corresponding path program 1 times [2020-12-22 19:26:22,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223460254] [2020-12-22 19:26:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:22,362 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 19:26:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223460254] [2020-12-22 19:26:22,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:26:22,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:26:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428776393] [2020-12-22 19:26:22,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:26:22,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:26:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:26:22,365 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-12-22 19:26:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:22,583 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-12-22 19:26:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:26:22,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 19:26:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:22,584 INFO L225 Difference]: With dead ends: 60 [2020-12-22 19:26:22,585 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 19:26:22,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:26:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 19:26:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-12-22 19:26:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 19:26:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-22 19:26:22,590 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2020-12-22 19:26:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:22,590 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-22 19:26:22,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:26:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-22 19:26:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:26:22,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:22,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:22,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:26:22,592 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 475164067, now seen corresponding path program 1 times [2020-12-22 19:26:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:22,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449343185] [2020-12-22 19:26:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:26:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449343185] [2020-12-22 19:26:22,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150696504] [2020-12-22 19:26:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:26:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:26:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:26:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:26:22,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:26:22,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:26:22,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:26:22,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:26:22,936 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:26:22,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:26:22,943 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:26:22,943 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-12-22 19:26:22,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:26:22,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:26:23,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:26:23,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:26:23,008 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:26:23,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:26:23,012 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:26:23,012 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-22 19:26:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:26:23,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:26:23,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2020-12-22 19:26:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411434638] [2020-12-22 19:26:23,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:26:23,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:26:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:26:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:26:23,022 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-12-22 19:26:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:26:23,254 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-22 19:26:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:26:23,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-22 19:26:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:26:23,256 INFO L225 Difference]: With dead ends: 55 [2020-12-22 19:26:23,256 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:26:23,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:26:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:26:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-22 19:26:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:26:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-22 19:26:23,260 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 16 [2020-12-22 19:26:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:26:23,260 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-22 19:26:23,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:26:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-22 19:26:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:26:23,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:26:23,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:26:23,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 19:26:23,478 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:26:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:26:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1845182904, now seen corresponding path program 1 times [2020-12-22 19:26:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:26:23,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273553303] [2020-12-22 19:26:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:26:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 19:26:23,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 19:26:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 19:26:23,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 19:26:23,575 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 19:26:23,576 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 19:26:23,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 19:26:23,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:26:23 BoogieIcfgContainer [2020-12-22 19:26:23,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:26:23,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:26:23,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:26:23,616 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:26:23,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:26:20" (3/4) ... [2020-12-22 19:26:23,623 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 19:26:23,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:26:23,626 INFO L168 Benchmark]: Toolchain (without parser) took 4811.52 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 129.3 MB in the beginning and 73.4 MB in the end (delta: 55.9 MB). Peak memory consumption was 88.9 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,628 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:26:23,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.91 ms. Allocated memory is still 155.2 MB. Free memory was 129.1 MB in the beginning and 107.6 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.94 ms. Allocated memory is still 155.2 MB. Free memory was 107.4 MB in the beginning and 105.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,639 INFO L168 Benchmark]: Boogie Preprocessor took 99.96 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 137.7 MB in the end (delta: -31.9 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,643 INFO L168 Benchmark]: RCFGBuilder took 569.55 ms. Allocated memory is still 155.2 MB. Free memory was 137.7 MB in the beginning and 116.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,646 INFO L168 Benchmark]: TraceAbstraction took 3390.88 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 116.2 MB in the beginning and 73.9 MB in the end (delta: 42.3 MB). Peak memory consumption was 74.8 MB. Max. memory is 8.0 GB. [2020-12-22 19:26:23,647 INFO L168 Benchmark]: Witness Printer took 7.84 ms. Allocated memory is still 186.6 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:26:23,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 649.91 ms. Allocated memory is still 155.2 MB. Free memory was 129.1 MB in the beginning and 107.6 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 74.94 ms. Allocated memory is still 155.2 MB. Free memory was 107.4 MB in the beginning and 105.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 99.96 ms. Allocated memory is still 155.2 MB. Free memory was 105.8 MB in the beginning and 137.7 MB in the end (delta: -31.9 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 569.55 ms. Allocated memory is still 155.2 MB. Free memory was 137.7 MB in the beginning and 116.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3390.88 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 116.2 MB in the beginning and 73.9 MB in the end (delta: 42.3 MB). Peak memory consumption was 74.8 MB. Max. memory is 8.0 GB. * Witness Printer took 7.84 ms. Allocated memory is still 186.6 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 522 SDslu, 313 SDs, 0 SdLazy, 562 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 8327 SizeOfPredicates, 10 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...