/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/test-0158-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:06:48,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:06:48,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:06:48,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:06:48,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:06:48,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:06:48,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:06:48,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:06:48,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:06:48,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:06:48,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:06:48,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:06:48,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:06:48,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:06:48,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:06:48,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:06:48,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:06:48,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:06:48,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:06:48,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:06:48,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:06:48,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:06:48,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:06:48,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:06:48,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:06:48,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:06:48,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:06:48,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:06:48,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:06:48,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:06:48,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:06:48,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:06:48,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:06:48,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:06:48,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:06:48,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:06:48,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:06:48,751 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:06:48,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:06:48,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:06:48,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:06:48,757 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:06:48,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:06:48,758 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:06:48,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:06:48,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:06:48,758 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:06:48,759 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:06:48,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:06:48,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:06:48,760 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:06:48,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:06:48,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:06:48,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:06:48,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:06:48,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:06:48,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:06:48,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:06:48,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:06:48,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:06:48,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:06:48,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:06:49,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:06:49,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:06:49,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:06:49,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:06:49,224 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:06:49,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0158-1.i [2020-12-22 19:06:49,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26eb2b24/d7206b7c1d944151a95d8f62c18d224c/FLAGfca678272 [2020-12-22 19:06:50,072 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:06:50,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0158-1.i [2020-12-22 19:06:50,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26eb2b24/d7206b7c1d944151a95d8f62c18d224c/FLAGfca678272 [2020-12-22 19:06:50,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f26eb2b24/d7206b7c1d944151a95d8f62c18d224c [2020-12-22 19:06:50,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:06:50,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:06:50,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:06:50,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:06:50,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:06:50,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467f008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50, skipping insertion in model container [2020-12-22 19:06:50,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:06:50,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:06:50,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:06:50,725 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:06:50,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:06:50,861 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:06:50,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50 WrapperNode [2020-12-22 19:06:50,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:06:50,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:06:50,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:06:50,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:06:50,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:06:50,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:06:50,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:06:50,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:06:50,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (1/1) ... [2020-12-22 19:06:50,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:06:50,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:06:50,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:06:50,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:06:50,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (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 19:06:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:06:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 19:06:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:06:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 19:06:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:06:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:06:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:06:51,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:06:51,334 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:06:51,334 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 19:06:51,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:06:51 BoogieIcfgContainer [2020-12-22 19:06:51,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:06:51,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:06:51,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:06:51,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:06:51,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:06:50" (1/3) ... [2020-12-22 19:06:51,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b9db6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:06:51, skipping insertion in model container [2020-12-22 19:06:51,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:06:50" (2/3) ... [2020-12-22 19:06:51,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b9db6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:06:51, skipping insertion in model container [2020-12-22 19:06:51,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:06:51" (3/3) ... [2020-12-22 19:06:51,348 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0158-1.i [2020-12-22 19:06:51,355 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:06:51,361 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-22 19:06:51,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-22 19:06:51,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:06:51,465 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:06:51,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:06:51,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:06:51,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:06:51,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:06:51,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:06:51,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:06:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 19:06:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:06:51,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:51,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:06:51,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-22 19:06:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:51,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031348314] [2020-12-22 19:06:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:51,805 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 19:06:51,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031348314] [2020-12-22 19:06:51,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:51,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:06:51,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563135372] [2020-12-22 19:06:51,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:06:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:06:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:06:51,839 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-22 19:06:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:51,894 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2020-12-22 19:06:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:06:51,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:06:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:51,906 INFO L225 Difference]: With dead ends: 18 [2020-12-22 19:06:51,907 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 19:06:51,909 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 [2020-12-22 19:06:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 19:06:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 19:06:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 19:06:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-12-22 19:06:51,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 3 [2020-12-22 19:06:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:51,949 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-12-22 19:06:51,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:06:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-12-22 19:06:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:06:51,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:51,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:06:51,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:06:51,952 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-22 19:06:51,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:51,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344417662] [2020-12-22 19:06:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:52,015 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 19:06:52,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344417662] [2020-12-22 19:06:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:52,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:06:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704995168] [2020-12-22 19:06:52,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:06:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:06:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:06:52,019 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 3 states. [2020-12-22 19:06:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:52,041 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2020-12-22 19:06:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:06:52,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:06:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:52,042 INFO L225 Difference]: With dead ends: 13 [2020-12-22 19:06:52,043 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 19:06:52,044 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 [2020-12-22 19:06:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 19:06:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 19:06:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 19:06:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2020-12-22 19:06:52,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 3 [2020-12-22 19:06:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2020-12-22 19:06:52,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:06:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2020-12-22 19:06:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:06:52,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:52,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:06:52,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:06:52,049 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2020-12-22 19:06:52,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:52,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545166090] [2020-12-22 19:06:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:52,127 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 19:06:52,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545166090] [2020-12-22 19:06:52,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:52,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:06:52,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387907605] [2020-12-22 19:06:52,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:06:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:52,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:06:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:06:52,132 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 5 states. [2020-12-22 19:06:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:52,203 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2020-12-22 19:06:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:06:52,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 19:06:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:52,205 INFO L225 Difference]: With dead ends: 12 [2020-12-22 19:06:52,205 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 19:06:52,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 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 19:06:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 19:06:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 19:06:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 19:06:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2020-12-22 19:06:52,216 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 6 [2020-12-22 19:06:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:52,224 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2020-12-22 19:06:52,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:06:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2020-12-22 19:06:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:06:52,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:52,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:52,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:06:52,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1803027012, now seen corresponding path program 1 times [2020-12-22 19:06:52,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:52,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366167353] [2020-12-22 19:06:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:52,365 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 19:06:52,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366167353] [2020-12-22 19:06:52,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:52,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:06:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311306993] [2020-12-22 19:06:52,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:06:52,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:52,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:06:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:06:52,368 INFO L87 Difference]: Start difference. First operand 12 states and 11 transitions. Second operand 5 states. [2020-12-22 19:06:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:52,418 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-12-22 19:06:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:06:52,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 19:06:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:52,420 INFO L225 Difference]: With dead ends: 11 [2020-12-22 19:06:52,420 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 19:06:52,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 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 19:06:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 19:06:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 19:06:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 19:06:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-12-22 19:06:52,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 7 [2020-12-22 19:06:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:52,424 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-12-22 19:06:52,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:06:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-12-22 19:06:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:06:52,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:52,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:52,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:06:52,425 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:52,426 INFO L82 PathProgramCache]: Analyzing trace with hash 59262571, now seen corresponding path program 1 times [2020-12-22 19:06:52,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:52,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566442720] [2020-12-22 19:06:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:52,487 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 19:06:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566442720] [2020-12-22 19:06:52,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:52,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:06:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575994117] [2020-12-22 19:06:52,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:06:52,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:06:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:06:52,490 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 5 states. [2020-12-22 19:06:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:52,545 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2020-12-22 19:06:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:06:52,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 19:06:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:52,547 INFO L225 Difference]: With dead ends: 10 [2020-12-22 19:06:52,547 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 19:06:52,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 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 19:06:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 19:06:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 19:06:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 19:06:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2020-12-22 19:06:52,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 8 [2020-12-22 19:06:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:52,552 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2020-12-22 19:06:52,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:06:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2020-12-22 19:06:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:06:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:52,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:52,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:06:52,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1837139751, now seen corresponding path program 1 times [2020-12-22 19:06:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:52,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102945364] [2020-12-22 19:06:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:52,747 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 19:06:52,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102945364] [2020-12-22 19:06:52,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:06:52,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:06:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732493083] [2020-12-22 19:06:52,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:06:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:06:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:06:52,750 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand 6 states. [2020-12-22 19:06:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:52,834 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-12-22 19:06:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:06:52,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-22 19:06:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:52,835 INFO L225 Difference]: With dead ends: 9 [2020-12-22 19:06:52,836 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:06:52,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:06:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:06:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:06:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:06:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:06:52,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-22 19:06:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:52,838 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:06:52,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:06:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:06:52,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:06:52,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:06:52,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:06:52 BoogieIcfgContainer [2020-12-22 19:06:52,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:06:52,845 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:06:52,845 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:06:52,845 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:06:52,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:06:51" (3/4) ... [2020-12-22 19:06:52,850 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:06:52,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-22 19:06:52,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:06:52,864 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 19:06:52,864 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 19:06:52,904 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/memsafety/test-0158-1.i-witness.graphml [2020-12-22 19:06:52,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:06:52,907 INFO L168 Benchmark]: Toolchain (without parser) took 2599.21 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 56.1 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,907 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:06:52,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.63 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.43 ms. Allocated memory is still 151.0 MB. Free memory was 103.2 MB in the beginning and 101.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,909 INFO L168 Benchmark]: Boogie Preprocessor took 28.29 ms. Allocated memory is still 151.0 MB. Free memory was 101.6 MB in the beginning and 100.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,910 INFO L168 Benchmark]: RCFGBuilder took 392.34 ms. Allocated memory is still 151.0 MB. Free memory was 100.2 MB in the beginning and 84.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,911 INFO L168 Benchmark]: TraceAbstraction took 1505.84 ms. Allocated memory is still 151.0 MB. Free memory was 84.5 MB in the beginning and 58.7 MB in the end (delta: 25.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,911 INFO L168 Benchmark]: Witness Printer took 59.71 ms. Allocated memory is still 151.0 MB. Free memory was 58.7 MB in the beginning and 56.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:06:52,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 552.63 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.43 ms. Allocated memory is still 151.0 MB. Free memory was 103.2 MB in the beginning and 101.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.29 ms. Allocated memory is still 151.0 MB. Free memory was 101.6 MB in the beginning and 100.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.34 ms. Allocated memory is still 151.0 MB. Free memory was 100.2 MB in the beginning and 84.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1505.84 ms. Allocated memory is still 151.0 MB. Free memory was 84.5 MB in the beginning and 58.7 MB in the end (delta: 25.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. * Witness Printer took 59.71 ms. Allocated memory is still 151.0 MB. Free memory was 58.7 MB in the beginning and 56.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 533]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 533]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 61 SDslu, 10 SDs, 0 SdLazy, 83 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1786 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 correct! Received shutdown request...