/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/memsafety/cmp-freed-ptr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:09:16,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:09:16,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:09:16,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:09:16,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:09:16,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:09:16,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:09:16,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:09:16,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:09:16,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:09:16,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:09:16,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:09:16,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:09:16,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:09:16,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:09:16,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:09:16,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:09:16,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:09:16,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:09:16,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:09:16,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:09:16,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:09:16,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:09:16,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:09:16,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:09:16,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:09:16,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:09:16,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:09:16,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:09:16,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:09:16,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:09:16,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:09:16,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:09:16,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:09:16,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:09:16,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:09:16,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:09:16,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:09:16,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:09:16,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:09:16,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:09:16,459 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:09:16,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:09:16,459 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:09:16,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:09:16,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:09:16,460 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:09:16,461 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:09:16,461 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:09:16,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:09:16,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:09:16,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:09:16,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:09:16,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:09:16,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:09:16,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:09:16,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:09:16,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:09:16,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:09:16,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:09:16,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:09:16,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:09:16,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:09:16,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:09:16,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:09:16,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:09:16,926 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:09:16,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-01-07 05:09:17,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a6ba461bc/bedd17774635441a9539c3add81b6432/FLAG882c8a9e2 [2021-01-07 05:09:17,699 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:09:17,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-01-07 05:09:17,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a6ba461bc/bedd17774635441a9539c3add81b6432/FLAG882c8a9e2 [2021-01-07 05:09:18,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a6ba461bc/bedd17774635441a9539c3add81b6432 [2021-01-07 05:09:18,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:09:18,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:09:18,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:18,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:09:18,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:09:18,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14aaa766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18, skipping insertion in model container [2021-01-07 05:09:18,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:09:18,065 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-07 05:09:18,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:18,339 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-07 05:09:18,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:09:18,439 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:09:18,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18 WrapperNode [2021-01-07 05:09:18,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:09:18,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:18,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:09:18,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:09:18,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:09:18,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:09:18,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:09:18,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:09:18,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... [2021-01-07 05:09:18,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:09:18,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:09:18,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:09:18,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:09:18,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:09:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:09:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:09:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:09:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:09:19,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:09:19,129 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-07 05:09:19,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:19 BoogieIcfgContainer [2021-01-07 05:09:19,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:09:19,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:09:19,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:09:19,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:09:19,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:09:18" (1/3) ... [2021-01-07 05:09:19,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de8a249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:19, skipping insertion in model container [2021-01-07 05:09:19,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:09:18" (2/3) ... [2021-01-07 05:09:19,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de8a249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:09:19, skipping insertion in model container [2021-01-07 05:09:19,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:19" (3/3) ... [2021-01-07 05:09:19,141 INFO L111 eAbstractionObserver]: Analyzing ICFG cmp-freed-ptr.i [2021-01-07 05:09:19,148 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:09:19,153 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2021-01-07 05:09:19,175 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-01-07 05:09:19,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:09:19,199 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:09:19,199 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:09:19,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:09:19,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:09:19,199 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:09:19,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:09:19,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:09:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2021-01-07 05:09:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-01-07 05:09:19,223 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-01-07 05:09:19,226 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-01-07 05:09:19,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431452301] [2021-01-07 05:09:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431452301] [2021-01-07 05:09:19,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:19,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97019850] [2021-01-07 05:09:19,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:19,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,463 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2021-01-07 05:09:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,482 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-07 05:09:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:19,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-01-07 05:09:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,493 INFO L225 Difference]: With dead ends: 24 [2021-01-07 05:09:19,494 INFO L226 Difference]: Without dead ends: 22 [2021-01-07 05:09:19,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-07 05:09:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-07 05:09:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-07 05:09:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-07 05:09:19,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 3 [2021-01-07 05:09:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,531 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-07 05:09:19,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-07 05:09:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-01-07 05:09:19,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-01-07 05:09:19,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:09:19,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-01-07 05:09:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029493637] [2021-01-07 05:09:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029493637] [2021-01-07 05:09:19,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:19,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:19,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96219406] [2021-01-07 05:09:19,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:19,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,602 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2021-01-07 05:09:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,629 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-01-07 05:09:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:19,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-01-07 05:09:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,631 INFO L225 Difference]: With dead ends: 21 [2021-01-07 05:09:19,631 INFO L226 Difference]: Without dead ends: 21 [2021-01-07 05:09:19,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-07 05:09:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-07 05:09:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-07 05:09:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-07 05:09:19,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 4 [2021-01-07 05:09:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,637 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-07 05:09:19,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-07 05:09:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-07 05:09:19,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-07 05:09:19,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:09:19,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 28692770, now seen corresponding path program 1 times [2021-01-07 05:09:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088537399] [2021-01-07 05:09:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088537399] [2021-01-07 05:09:19,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:19,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559252124] [2021-01-07 05:09:19,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,681 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2021-01-07 05:09:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,708 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-07 05:09:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:19,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-01-07 05:09:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,709 INFO L225 Difference]: With dead ends: 20 [2021-01-07 05:09:19,710 INFO L226 Difference]: Without dead ends: 20 [2021-01-07 05:09:19,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-07 05:09:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-07 05:09:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-07 05:09:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-07 05:09:19,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 5 [2021-01-07 05:09:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,715 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-07 05:09:19,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-07 05:09:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:09:19,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:19,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:09:19,716 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1803949765, now seen corresponding path program 1 times [2021-01-07 05:09:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194229388] [2021-01-07 05:09:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194229388] [2021-01-07 05:09:19,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:19,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:19,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498369496] [2021-01-07 05:09:19,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:19,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:19,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,807 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 3 states. [2021-01-07 05:09:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,822 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-07 05:09:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:19,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-07 05:09:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,823 INFO L225 Difference]: With dead ends: 18 [2021-01-07 05:09:19,824 INFO L226 Difference]: Without dead ends: 18 [2021-01-07 05:09:19,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-07 05:09:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-07 05:09:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-07 05:09:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-07 05:09:19,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2021-01-07 05:09:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,828 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-07 05:09:19,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-07 05:09:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-07 05:09:19,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:19,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-07 05:09:19,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash 87867921, now seen corresponding path program 1 times [2021-01-07 05:09:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116500340] [2021-01-07 05:09:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:19,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116500340] [2021-01-07 05:09:19,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:19,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:19,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622039474] [2021-01-07 05:09:19,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:19,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,882 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2021-01-07 05:09:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:19,915 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-01-07 05:09:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:19,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-07 05:09:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:19,917 INFO L225 Difference]: With dead ends: 16 [2021-01-07 05:09:19,917 INFO L226 Difference]: Without dead ends: 16 [2021-01-07 05:09:19,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-07 05:09:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-07 05:09:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-07 05:09:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-07 05:09:19,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2021-01-07 05:09:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:19,921 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-07 05:09:19,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-07 05:09:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:09:19,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:19,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:19,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:09:19,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1571061689, now seen corresponding path program 1 times [2021-01-07 05:09:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:19,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956690689] [2021-01-07 05:09:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:20,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956690689] [2021-01-07 05:09:20,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:20,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:09:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663389189] [2021-01-07 05:09:20,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:09:20,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:09:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:20,010 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2021-01-07 05:09:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:20,056 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-07 05:09:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:09:20,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-07 05:09:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:20,058 INFO L225 Difference]: With dead ends: 18 [2021-01-07 05:09:20,058 INFO L226 Difference]: Without dead ends: 18 [2021-01-07 05:09:20,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:09:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-07 05:09:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-07 05:09:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-07 05:09:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-07 05:09:20,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2021-01-07 05:09:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:20,063 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-07 05:09:20,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:09:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-07 05:09:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-07 05:09:20,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:20,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:20,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:09:20,065 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1458272044, now seen corresponding path program 1 times [2021-01-07 05:09:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047613040] [2021-01-07 05:09:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:09:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:09:20,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047613040] [2021-01-07 05:09:20,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:09:20,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:09:20,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971186237] [2021-01-07 05:09:20,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:09:20,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:09:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:09:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:09:20,175 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2021-01-07 05:09:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:09:20,272 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-01-07 05:09:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:09:20,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-07 05:09:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:09:20,274 INFO L225 Difference]: With dead ends: 17 [2021-01-07 05:09:20,274 INFO L226 Difference]: Without dead ends: 13 [2021-01-07 05:09:20,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:09:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-07 05:09:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-07 05:09:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-07 05:09:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2021-01-07 05:09:20,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 10 [2021-01-07 05:09:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:09:20,278 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2021-01-07 05:09:20,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:09:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2021-01-07 05:09:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:09:20,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:09:20,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:09:20,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:09:20,280 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:09:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:09:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -16437808, now seen corresponding path program 1 times [2021-01-07 05:09:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:09:20,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771042197] [2021-01-07 05:09:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:09:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:09:20,306 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:09:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:09:20,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:09:20,349 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-07 05:09:20,350 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-07 05:09:20,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-07 05:09:20,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:09:20 BoogieIcfgContainer [2021-01-07 05:09:20,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:09:20,385 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:09:20,385 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:09:20,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:09:20,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:09:19" (3/4) ... [2021-01-07 05:09:20,389 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-07 05:09:20,433 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety/cmp-freed-ptr.i-witness.graphml [2021-01-07 05:09:20,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:09:20,436 INFO L168 Benchmark]: Toolchain (without parser) took 2428.14 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 57.5 MB in the end (delta: 67.3 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,436 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:09:20,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.41 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 105.2 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.29 ms. Allocated memory is still 151.0 MB. Free memory was 105.0 MB in the beginning and 103.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,438 INFO L168 Benchmark]: Boogie Preprocessor took 46.95 ms. Allocated memory is still 151.0 MB. Free memory was 103.4 MB in the beginning and 102.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,439 INFO L168 Benchmark]: RCFGBuilder took 566.77 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 123.6 MB in the end (delta: -21.5 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,440 INFO L168 Benchmark]: TraceAbstraction took 1251.66 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 59.1 MB in the end (delta: 64.0 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,441 INFO L168 Benchmark]: Witness Printer took 48.36 ms. Allocated memory is still 151.0 MB. Free memory was 59.1 MB in the beginning and 57.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:09:20,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 432.41 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 105.2 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 73.29 ms. Allocated memory is still 151.0 MB. Free memory was 105.0 MB in the beginning and 103.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.95 ms. Allocated memory is still 151.0 MB. Free memory was 103.4 MB in the beginning and 102.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 566.77 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 123.6 MB in the end (delta: -21.5 MB). Peak memory consumption was 7.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1251.66 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 59.1 MB in the end (delta: 64.0 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * Witness Printer took 48.36 ms. Allocated memory is still 151.0 MB. Free memory was 59.1 MB in the beginning and 57.5 MB in the end (delta: 1.6 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: 554]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L543] struct T* x = ((void *)0); [L544] struct T* y = ((void *)0); [L545] y = malloc(sizeof(*y)) [L546] intptr_t adressY = (intptr_t) y; [L547] free(y) [L547] free(y) [L547] free(y) [L548] x = malloc(sizeof(*x)) [L549] intptr_t adressX = (intptr_t) x; [L550] COND TRUE adressX == adressY [L552] free(x) [L552] free(x) [L552] free(x) [L554] free(x) [L554] free(x) [L554] free(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 73 SDslu, 27 SDs, 0 SdLazy, 67 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 976 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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...