/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/ldv-memsafety/memset.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:20:06,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:20:06,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:20:06,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:20:06,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:20:06,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:20:06,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:20:06,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:20:06,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:20:06,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:20:06,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:20:06,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:20:06,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:20:06,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:20:06,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:20:06,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:20:06,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:20:06,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:20:06,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:20:06,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:20:06,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:20:06,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:20:06,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:20:06,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:20:06,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:20:06,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:20:06,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:20:06,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:20:06,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:20:06,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:20:06,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:20:06,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:20:06,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:20:06,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:20:06,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:20:06,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:20:06,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:20:06,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:20:06,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:20:06,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:20:06,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:20:06,225 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:20:06,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:20:06,228 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:20:06,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:20:06,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:20:06,229 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:20:06,229 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:20:06,229 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:20:06,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:20:06,230 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:20:06,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:20:06,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:20:06,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:20:06,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:20:06,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:20:06,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:20:06,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:20:06,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:20:06,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:20:06,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:20:06,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:20:06,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:20:06,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:20:06,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:20:06,751 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:20:06,752 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:20:06,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset.c [2020-12-22 19:20:06,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f7369/e2d2f84714074fd3880e52ca9afd7dfa/FLAG546253800 [2020-12-22 19:20:07,394 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:20:07,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset.c [2020-12-22 19:20:07,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f7369/e2d2f84714074fd3880e52ca9afd7dfa/FLAG546253800 [2020-12-22 19:20:07,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba7f7369/e2d2f84714074fd3880e52ca9afd7dfa [2020-12-22 19:20:07,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:20:07,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:20:07,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:20:07,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:20:07,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:20:07,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:07,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20326b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07, skipping insertion in model container [2020-12-22 19:20:07,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:07,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:20:07,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:20:07,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:20:07,959 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:20:07,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:20:07,993 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:20:07,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07 WrapperNode [2020-12-22 19:20:07,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:20:07,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:20:07,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:20:07,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:20:08,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:20:08,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:20:08,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:20:08,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:20:08,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (1/1) ... [2020-12-22 19:20:08,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:20:08,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:20:08,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:20:08,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:20:08,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (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 19:20:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:20:08,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:20:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:20:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:20:08,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:20:08,484 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 19:20:08,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08 BoogieIcfgContainer [2020-12-22 19:20:08,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:20:08,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:20:08,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:20:08,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:20:08,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:07" (1/3) ... [2020-12-22 19:20:08,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be5975e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:08, skipping insertion in model container [2020-12-22 19:20:08,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:07" (2/3) ... [2020-12-22 19:20:08,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be5975e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:08, skipping insertion in model container [2020-12-22 19:20:08,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08" (3/3) ... [2020-12-22 19:20:08,497 INFO L111 eAbstractionObserver]: Analyzing ICFG memset.c [2020-12-22 19:20:08,504 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:20:08,509 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 19:20:08,535 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 19:20:08,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:20:08,564 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:20:08,564 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:20:08,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:20:08,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:20:08,565 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:20:08,565 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:20:08,565 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:20:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 19:20:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:20:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:08,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:20:08,589 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-12-22 19:20:08,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:08,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286768342] [2020-12-22 19:20:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:08,785 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 19:20:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286768342] [2020-12-22 19:20:08,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:08,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:20:08,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044792344] [2020-12-22 19:20:08,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:20:08,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:20:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:20:08,809 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 19:20:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:08,844 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-22 19:20:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:20:08,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:20:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:08,855 INFO L225 Difference]: With dead ends: 11 [2020-12-22 19:20:08,855 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 19:20:08,857 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 19:20:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 19:20:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 19:20:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 19:20:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 19:20:08,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2020-12-22 19:20:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:08,893 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 19:20:08,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:20:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 19:20:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:20:08,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:08,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:20:08,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:20:08,895 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-12-22 19:20:08,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:08,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826248149] [2020-12-22 19:20:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:08,964 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 19:20:08,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826248149] [2020-12-22 19:20:08,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:20:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034302907] [2020-12-22 19:20:08,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:20:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:20:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:20:08,970 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-12-22 19:20:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:08,989 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-12-22 19:20:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:20:08,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:20:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:08,991 INFO L225 Difference]: With dead ends: 8 [2020-12-22 19:20:08,991 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 19:20:08,993 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 19:20:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 19:20:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 19:20:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 19:20:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 19:20:08,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2020-12-22 19:20:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:08,996 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 19:20:08,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:20:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 19:20:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:20:08,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:08,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:08,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:20:09,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2020-12-22 19:20:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712242876] [2020-12-22 19:20:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,055 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 19:20:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712242876] [2020-12-22 19:20:09,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:09,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:20:09,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740820543] [2020-12-22 19:20:09,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:20:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:20:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:20:09,059 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2020-12-22 19:20:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,083 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-22 19:20:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:20:09,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:20:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,085 INFO L225 Difference]: With dead ends: 9 [2020-12-22 19:20:09,085 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 19:20:09,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:20:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 19:20:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 19:20:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 19:20:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 19:20:09,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 19:20:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,089 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 19:20:09,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:20:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 19:20:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:20:09,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:09,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:20:09,091 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 87920521, now seen corresponding path program 1 times [2020-12-22 19:20:09,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701490837] [2020-12-22 19:20:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:09,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701490837] [2020-12-22 19:20:09,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593448894] [2020-12-22 19:20:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:20:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:09,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:09,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 19:20:09,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006492460] [2020-12-22 19:20:09,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:20:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:20:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,356 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2020-12-22 19:20:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,381 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-22 19:20:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:20:09,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-22 19:20:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,383 INFO L225 Difference]: With dead ends: 10 [2020-12-22 19:20:09,383 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 19:20:09,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 19:20:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 19:20:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 19:20:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 19:20:09,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 19:20:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,387 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 19:20:09,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:20:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 19:20:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:20:09,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,389 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:09,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:09,606 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 2 times [2020-12-22 19:20:09,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800049564] [2020-12-22 19:20:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:09,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800049564] [2020-12-22 19:20:09,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237821616] [2020-12-22 19:20:09,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:09,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:20:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:20:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:20:09,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:20:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-22 19:20:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963510087] [2020-12-22 19:20:09,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:20:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:20:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,885 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-12-22 19:20:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,905 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-22 19:20:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:20:09,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:20:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,906 INFO L225 Difference]: With dead ends: 9 [2020-12-22 19:20:09,906 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:20:09,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:20:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:20:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:20:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:20:09,908 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-22 19:20:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,908 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:20:09,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:20:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:20:09,909 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:20:10,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:10,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:20:10 BoogieIcfgContainer [2020-12-22 19:20:10,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:20:10,133 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:20:10,133 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:20:10,133 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:20:10,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08" (3/4) ... [2020-12-22 19:20:10,138 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:20:10,153 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-22 19:20:10,153 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-22 19:20:10,153 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:20:10,202 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/memset.c-witness.graphml [2020-12-22 19:20:10,202 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:20:10,204 INFO L168 Benchmark]: Toolchain (without parser) took 2434.50 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 118.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,206 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:20:10,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.79 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 119.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,213 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.35 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,214 INFO L168 Benchmark]: Boogie Preprocessor took 24.54 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 117.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,216 INFO L168 Benchmark]: RCFGBuilder took 424.85 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 106.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,216 INFO L168 Benchmark]: TraceAbstraction took 1644.04 ms. Allocated memory is still 153.1 MB. Free memory was 105.7 MB in the beginning and 120.3 MB in the end (delta: -14.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:20:10,218 INFO L168 Benchmark]: Witness Printer took 69.09 ms. Allocated memory is still 153.1 MB. Free memory was 120.3 MB in the beginning and 118.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.79 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 119.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.35 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 118.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.54 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 117.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.85 ms. Allocated memory is still 153.1 MB. Free memory was 117.2 MB in the beginning and 106.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1644.04 ms. Allocated memory is still 153.1 MB. Free memory was 105.7 MB in the beginning and 120.3 MB in the end (delta: -14.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 69.09 ms. Allocated memory is still 153.1 MB. Free memory was 120.3 MB in the beginning and 118.2 MB in the end (delta: 2.1 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: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 20 SDslu, 21 SDs, 0 SdLazy, 40 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 48 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 41 ConstructedInterpolants, 1 QuantifiedInterpolants, 1433 SizeOfPredicates, 3 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...