/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/array-memsafety/openbsd_cmemset-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:57:07,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:57:07,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:57:07,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:57:07,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:57:07,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:57:07,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:57:07,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:57:07,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:57:07,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:57:07,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:57:07,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:57:07,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:57:07,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:57:07,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:57:07,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:57:07,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:57:07,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:57:07,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:57:07,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:57:07,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:57:07,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:57:07,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:57:07,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:57:07,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 18:57:07,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:57:07,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:57:07,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:57:07,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:57:07,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:57:07,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:57:07,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:57:07,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:57:07,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:57:07,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:57:07,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:57:07,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:57:07,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:57:07,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:57:07,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:57:07,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:57:07,954 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:57:07,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:57:07,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:57:07,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:57:07,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:57:07,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:57:07,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:57:07,956 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:57:07,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:57:07,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:57:07,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:57:07,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:57:07,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:57:07,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:57:07,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:57:07,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:57:07,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:57:07,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:57:07,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:57:07,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:57:07,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:57:08,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:57:08,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:57:08,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:57:08,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:57:08,406 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:57:08,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-22 18:57:08,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a34576b6/e0feb293aca24b1980f8b074538187a0/FLAGf0d4f517e [2020-12-22 18:57:09,322 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:57:09,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-22 18:57:09,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a34576b6/e0feb293aca24b1980f8b074538187a0/FLAGf0d4f517e [2020-12-22 18:57:09,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a34576b6/e0feb293aca24b1980f8b074538187a0 [2020-12-22 18:57:09,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:57:09,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:57:09,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:57:09,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:57:09,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:57:09,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:57:09" (1/1) ... [2020-12-22 18:57:09,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb6ce4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:09, skipping insertion in model container [2020-12-22 18:57:09,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:57:09" (1/1) ... [2020-12-22 18:57:09,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:57:09,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:57:09,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:57:09,958 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:57:10,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:57:10,072 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:57:10,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10 WrapperNode [2020-12-22 18:57:10,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:57:10,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:57:10,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:57:10,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:57:10,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:57:10,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:57:10,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:57:10,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:57:10,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (1/1) ... [2020-12-22 18:57:10,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:57:10,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:57:10,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:57:10,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:57:10,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (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 18:57:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:57:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:57:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:57:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:57:10,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:57:10,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:57:10,683 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 18:57:10,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:57:10 BoogieIcfgContainer [2020-12-22 18:57:10,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:57:10,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:57:10,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:57:10,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:57:10,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:57:09" (1/3) ... [2020-12-22 18:57:10,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c23879c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:57:10, skipping insertion in model container [2020-12-22 18:57:10,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:57:10" (2/3) ... [2020-12-22 18:57:10,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c23879c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:57:10, skipping insertion in model container [2020-12-22 18:57:10,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:57:10" (3/3) ... [2020-12-22 18:57:10,696 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-12-22 18:57:10,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:57:10,708 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 18:57:10,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 18:57:10,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:57:10,795 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:57:10,795 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:57:10,795 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:57:10,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:57:10,796 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:57:10,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:57:10,801 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:57:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-22 18:57:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:57:10,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:10,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:10,835 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash 121322254, now seen corresponding path program 1 times [2020-12-22 18:57:10,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:10,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303943018] [2020-12-22 18:57:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:11,131 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 18:57:11,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303943018] [2020-12-22 18:57:11,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:11,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:57:11,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682183334] [2020-12-22 18:57:11,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:57:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:57:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:57:11,159 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-12-22 18:57:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:11,302 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-22 18:57:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:57:11,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 18:57:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:11,315 INFO L225 Difference]: With dead ends: 20 [2020-12-22 18:57:11,315 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 18:57:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:57:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 18:57:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-22 18:57:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 18:57:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-22 18:57:11,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2020-12-22 18:57:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:11,359 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-22 18:57:11,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:57:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-22 18:57:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 18:57:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:11,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:11,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:57:11,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash 121322255, now seen corresponding path program 1 times [2020-12-22 18:57:11,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:11,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299980022] [2020-12-22 18:57:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:11,519 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 18:57:11,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299980022] [2020-12-22 18:57:11,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:11,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:57:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291716765] [2020-12-22 18:57:11,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:57:11,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:57:11,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:57:11,528 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2020-12-22 18:57:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:11,633 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 18:57:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:57:11,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 18:57:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:11,635 INFO L225 Difference]: With dead ends: 24 [2020-12-22 18:57:11,635 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 18:57:11,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:57:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 18:57:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-12-22 18:57:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 18:57:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-22 18:57:11,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2020-12-22 18:57:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:11,642 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-22 18:57:11,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:57:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-22 18:57:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:57:11,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:11,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:11,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:57:11,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -533363702, now seen corresponding path program 1 times [2020-12-22 18:57:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:11,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899068332] [2020-12-22 18:57:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:11,714 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 18:57:11,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899068332] [2020-12-22 18:57:11,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:11,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:57:11,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161743740] [2020-12-22 18:57:11,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:57:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:57:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:57:11,717 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-12-22 18:57:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:11,747 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-22 18:57:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:57:11,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 18:57:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:11,749 INFO L225 Difference]: With dead ends: 34 [2020-12-22 18:57:11,749 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 18:57:11,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:57:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 18:57:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2020-12-22 18:57:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 18:57:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 18:57:11,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2020-12-22 18:57:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:11,754 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 18:57:11,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:57:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 18:57:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:57:11,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:11,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:11,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:57:11,756 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash -476105400, now seen corresponding path program 1 times [2020-12-22 18:57:11,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:11,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287481471] [2020-12-22 18:57:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:11,869 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 18:57:11,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287481471] [2020-12-22 18:57:11,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:11,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:57:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603175452] [2020-12-22 18:57:11,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:57:11,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:57:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:57:11,874 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-22 18:57:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:11,912 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-22 18:57:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:57:11,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 18:57:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:11,916 INFO L225 Difference]: With dead ends: 22 [2020-12-22 18:57:11,916 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 18:57:11,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:57:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 18:57:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-12-22 18:57:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 18:57:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-22 18:57:11,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2020-12-22 18:57:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-22 18:57:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:57:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-22 18:57:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:57:11,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:11,925 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:11,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 18:57:11,927 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 188498229, now seen corresponding path program 1 times [2020-12-22 18:57:11,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:11,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964816958] [2020-12-22 18:57:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964816958] [2020-12-22 18:57:12,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:12,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:57:12,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669487780] [2020-12-22 18:57:12,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:57:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:57:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:57:12,036 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-12-22 18:57:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:12,076 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-22 18:57:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:57:12,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 18:57:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:12,077 INFO L225 Difference]: With dead ends: 29 [2020-12-22 18:57:12,077 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 18:57:12,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:57:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 18:57:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-22 18:57:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 18:57:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 18:57:12,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2020-12-22 18:57:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:12,082 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 18:57:12,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:57:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 18:57:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:57:12,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:12,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:12,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:57:12,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash -204528781, now seen corresponding path program 1 times [2020-12-22 18:57:12,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:12,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720268853] [2020-12-22 18:57:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:12,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720268853] [2020-12-22 18:57:12,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372721759] [2020-12-22 18:57:12,353 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 18:57:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 18:57:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:12,512 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:12,513 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:12,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:12,520 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:12,520 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:12,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:12,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 18:57:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312239084] [2020-12-22 18:57:12,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:57:12,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:57:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:57:12,724 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 16 states. [2020-12-22 18:57:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:12,962 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-22 18:57:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:57:12,963 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 18:57:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:12,964 INFO L225 Difference]: With dead ends: 31 [2020-12-22 18:57:12,964 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 18:57:12,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:57:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 18:57:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 18:57:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 18:57:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-12-22 18:57:12,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2020-12-22 18:57:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:12,969 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-12-22 18:57:12,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:57:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-12-22 18:57:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 18:57:12,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:12,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:13,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 18:57:13,185 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:13,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1548436090, now seen corresponding path program 1 times [2020-12-22 18:57:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:13,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151680737] [2020-12-22 18:57:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:13,239 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 18:57:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151680737] [2020-12-22 18:57:13,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:57:13,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:57:13,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564930388] [2020-12-22 18:57:13,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:57:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:57:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:57:13,242 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-12-22 18:57:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:13,255 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-22 18:57:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:57:13,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 18:57:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:13,257 INFO L225 Difference]: With dead ends: 29 [2020-12-22 18:57:13,257 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 18:57:13,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:57:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 18:57:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 18:57:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 18:57:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 18:57:13,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-12-22 18:57:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:13,261 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 18:57:13,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:57:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 18:57:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 18:57:13,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:13,262 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:13,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 18:57:13,263 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1854015663, now seen corresponding path program 2 times [2020-12-22 18:57:13,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:13,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380968344] [2020-12-22 18:57:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380968344] [2020-12-22 18:57:13,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049614265] [2020-12-22 18:57:13,732 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 18:57:13,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:13,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:13,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 18:57:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:13,841 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:13,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:13,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:13,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:13,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 18:57:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:14,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:14,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2020-12-22 18:57:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199413009] [2020-12-22 18:57:14,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 18:57:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 18:57:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:57:14,152 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2020-12-22 18:57:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:14,884 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-22 18:57:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:57:14,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2020-12-22 18:57:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:14,885 INFO L225 Difference]: With dead ends: 30 [2020-12-22 18:57:14,885 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 18:57:14,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:57:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 18:57:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 18:57:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 18:57:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-22 18:57:14,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2020-12-22 18:57:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:14,890 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-22 18:57:14,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 18:57:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-22 18:57:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 18:57:14,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:14,891 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:15,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:15,101 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-22 18:57:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1405416593, now seen corresponding path program 3 times [2020-12-22 18:57:15,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:15,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680752989] [2020-12-22 18:57:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680752989] [2020-12-22 18:57:15,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534257510] [2020-12-22 18:57:15,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:15,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 18:57:15,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:15,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 18:57:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:15,818 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:15,818 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:15,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 18:57:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:16,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:16,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-12-22 18:57:16,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346066913] [2020-12-22 18:57:16,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 18:57:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:16,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 18:57:16,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-12-22 18:57:16,354 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 27 states. [2020-12-22 18:57:17,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:17,474 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-22 18:57:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:57:17,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-22 18:57:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:17,476 INFO L225 Difference]: With dead ends: 34 [2020-12-22 18:57:17,477 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 18:57:17,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 18:57:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 18:57:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 18:57:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 18:57:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 18:57:17,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-22 18:57:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:17,479 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 18:57:17,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 18:57:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 18:57:17,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 18:57:17,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:17,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:57:17 BoogieIcfgContainer [2020-12-22 18:57:17,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 18:57:17,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 18:57:17,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 18:57:17,696 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 18:57:17,696 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:57:10" (3/4) ... [2020-12-22 18:57:17,700 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 18:57:17,711 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-22 18:57:17,711 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 18:57:17,711 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 18:57:17,763 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cmemset-alloca-1.i-witness.graphml [2020-12-22 18:57:17,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 18:57:17,765 INFO L168 Benchmark]: Toolchain (without parser) took 8176.17 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.9 MB in the beginning and 198.7 MB in the end (delta: -72.8 MB). Peak memory consumption was 97.5 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,765 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 18:57:17,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.83 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 105.7 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.27 ms. Allocated memory is still 151.0 MB. Free memory was 105.7 MB in the beginning and 103.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,767 INFO L168 Benchmark]: Boogie Preprocessor took 43.46 ms. Allocated memory is still 151.0 MB. Free memory was 103.9 MB in the beginning and 102.9 MB in the end (delta: 979.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,768 INFO L168 Benchmark]: RCFGBuilder took 490.63 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 87.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,768 INFO L168 Benchmark]: TraceAbstraction took 7007.25 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 87.2 MB in the beginning and 62.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,769 INFO L168 Benchmark]: Witness Printer took 67.79 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 61.9 MB in the beginning and 198.7 MB in the end (delta: -136.8 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. [2020-12-22 18:57:17,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 483.83 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 105.7 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 71.27 ms. Allocated memory is still 151.0 MB. Free memory was 105.7 MB in the beginning and 103.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.46 ms. Allocated memory is still 151.0 MB. Free memory was 103.9 MB in the beginning and 102.9 MB in the end (delta: 979.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 490.63 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 87.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7007.25 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 87.2 MB in the beginning and 62.4 MB in the end (delta: 24.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. * Witness Printer took 67.79 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 61.9 MB in the beginning and 198.7 MB in the end (delta: -136.8 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 154 SDslu, 546 SDs, 0 SdLazy, 751 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, 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, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 34547 SizeOfPredicates, 44 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 7/100 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...