/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:03,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:03,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:03,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:03,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:03,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:03,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:03,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:03,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:03,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:03,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:03,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:03,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:03,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:03,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:03,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:03,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:03,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:03,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:03,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:03,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:03,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:03,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:03,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:03,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:45:03,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:45:03,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:45:03,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:45:03,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:45:03,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:45:03,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:45:03,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:45:03,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:45:03,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:45:03,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:45:03,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:45:03,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:45:03,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:45:03,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:03,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:03,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:03,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:03,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:03,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:03,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:03,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:03,792 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:03,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:03,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:03,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:03,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:03,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:03,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:03,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:03,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:03,794 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:03,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:03,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:03,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:03,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:03,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:03,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:03,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:03,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:03,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:03,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:03,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:03,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:03,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:03,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:03,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:03,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:04,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:04,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:04,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:04,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:04,360 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:04,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-11-06 22:45:04,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca66aaa1/a6f922d166714087bd1fe806170b41ac/FLAGd2c178640 [2020-11-06 22:45:05,204 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:05,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2020-11-06 22:45:05,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca66aaa1/a6f922d166714087bd1fe806170b41ac/FLAGd2c178640 [2020-11-06 22:45:05,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca66aaa1/a6f922d166714087bd1fe806170b41ac [2020-11-06 22:45:05,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:05,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:05,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:05,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:05,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:05,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf1b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05, skipping insertion in model container [2020-11-06 22:45:05,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:05,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:05,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:05,740 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:05,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:05,775 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:05,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05 WrapperNode [2020-11-06 22:45:05,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:05,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:05,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:05,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:05,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (1/1) ... [2020-11-06 22:45:05,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:05,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:05,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:05,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:05,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (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 [2020-11-06 22:45:05,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:05,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:05,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:05,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:05,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:05,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:05,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:05,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:05,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 22:45:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:05,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:05,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:06,346 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:06,347 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:06,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:06 BoogieIcfgContainer [2020-11-06 22:45:06,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:06,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:06,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:06,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:06,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:05" (1/3) ... [2020-11-06 22:45:06,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70607d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:06, skipping insertion in model container [2020-11-06 22:45:06,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:05" (2/3) ... [2020-11-06 22:45:06,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70607d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:06, skipping insertion in model container [2020-11-06 22:45:06,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:06" (3/3) ... [2020-11-06 22:45:06,377 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-11-06 22:45:06,415 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:06,421 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:06,460 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:06,507 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:06,508 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:06,508 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:06,508 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:06,508 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:06,508 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:06,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:06,509 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:45:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:06,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:06,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:06,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1553397026, now seen corresponding path program 1 times [2020-11-06 22:45:06,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:06,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058414515] [2020-11-06 22:45:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:06,894 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-06 22:45:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058414515] [2020-11-06 22:45:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:06,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:06,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749369699] [2020-11-06 22:45:06,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:06,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:06,979 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:45:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:07,066 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-06 22:45:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:07,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:45:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:07,078 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:07,078 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:45:07,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:45:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:45:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:45:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-06 22:45:07,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-11-06 22:45:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:07,129 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-06 22:45:07,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-06 22:45:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:07,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:07,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:07,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:07,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1868317687, now seen corresponding path program 1 times [2020-11-06 22:45:07,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:07,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645052855] [2020-11-06 22:45:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:07,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645052855] [2020-11-06 22:45:07,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:07,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:45:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460844908] [2020-11-06 22:45:07,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:07,350 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-11-06 22:45:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:07,578 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-06 22:45:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:07,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-06 22:45:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:07,580 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:45:07,580 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:45:07,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:45:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-11-06 22:45:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:45:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-06 22:45:07,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-11-06 22:45:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:07,590 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-06 22:45:07,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-06 22:45:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:07,592 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:07,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:07,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:07,593 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1031623051, now seen corresponding path program 1 times [2020-11-06 22:45:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:07,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207326232] [2020-11-06 22:45:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:07,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207326232] [2020-11-06 22:45:07,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79239769] [2020-11-06 22:45:07,784 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 [2020-11-06 22:45:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:07,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:07,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-11-06 22:45:07,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844699960] [2020-11-06 22:45:07,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:45:08,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:08,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:45:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:08,001 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2020-11-06 22:45:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:08,475 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-06 22:45:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:45:08,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-11-06 22:45:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:08,476 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:45:08,477 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:45:08,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:45:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:45:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-06 22:45:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:45:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:45:08,485 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:45:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:08,485 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:45:08,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:45:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:45:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:45:08,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:08,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:08,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:08,702 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:08,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash -101010231, now seen corresponding path program 2 times [2020-11-06 22:45:08,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:08,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223893760] [2020-11-06 22:45:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:08,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:08,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223893760] [2020-11-06 22:45:08,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848285825] [2020-11-06 22:45:08,930 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 [2020-11-06 22:45:08,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:45:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:09,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:45:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872637986] [2020-11-06 22:45:09,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:45:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:45:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:45:09,083 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2020-11-06 22:45:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:09,453 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-06 22:45:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:09,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-11-06 22:45:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:09,454 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:45:09,455 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:45:09,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:45:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:45:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-06 22:45:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:45:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:45:09,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-11-06 22:45:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:09,464 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:45:09,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:45:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:45:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:45:09,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:09,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:09,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:09,679 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1116036917, now seen corresponding path program 3 times [2020-11-06 22:45:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642682872] [2020-11-06 22:45:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:09,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642682872] [2020-11-06 22:45:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102401401] [2020-11-06 22:45:09,888 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 [2020-11-06 22:45:09,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:45:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:45:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:10,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:10,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-11-06 22:45:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77676376] [2020-11-06 22:45:10,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:45:10,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:45:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:45:10,072 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-11-06 22:45:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:10,490 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-11-06 22:45:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:45:10,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-11-06 22:45:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:10,493 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:45:10,494 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 22:45:10,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:45:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 22:45:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-06 22:45:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:45:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:45:10,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-11-06 22:45:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:10,502 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:45:10,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:45:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:45:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:45:10,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:10,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:10,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:10,718 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1088691593, now seen corresponding path program 4 times [2020-11-06 22:45:10,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:10,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682049500] [2020-11-06 22:45:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:10,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:10,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682049500] [2020-11-06 22:45:10,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004047630] [2020-11-06 22:45:10,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:11,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:45:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:45:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:11,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:11,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:11,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-11-06 22:45:11,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011482687] [2020-11-06 22:45:11,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:45:11,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:45:11,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:11,164 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-11-06 22:45:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:11,589 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-11-06 22:45:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:11,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-06 22:45:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:11,592 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:45:11,592 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:11,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:45:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:11,594 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-11-06 22:45:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:11,595 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:11,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:45:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:11,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:11,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:11,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:12,059 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 18 [2020-11-06 22:45:12,212 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2020-11-06 22:45:12,215 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:12,216 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:12,216 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:12,216 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:12,216 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:12,216 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:12,217 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:12,217 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-11-06 22:45:12,217 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 14 34) no Hoare annotation was computed. [2020-11-06 22:45:12,217 INFO L266 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-11-06 22:45:12,218 INFO L266 CegarLoopResult]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2020-11-06 22:45:12,218 INFO L262 CegarLoopResult]: At program point L21-2(lines 21 29) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-11-06 22:45:12,218 INFO L262 CegarLoopResult]: At program point L21-3(lines 21 29) the Hoare annotation is: (or (= main_~len~0 0) (= main_~len~0 1) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2020-11-06 22:45:12,218 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 14 34) no Hoare annotation was computed. [2020-11-06 22:45:12,218 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-06 22:45:12,218 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:12,218 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:45:12,218 INFO L266 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-06 22:45:12,219 INFO L266 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-11-06 22:45:12,219 INFO L266 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:45:12,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:12 BoogieIcfgContainer [2020-11-06 22:45:12,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:12,252 INFO L168 Benchmark]: Toolchain (without parser) took 6720.14 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 132.3 MB in the beginning and 137.3 MB in the end (delta: -5.1 MB). Peak memory consumption was 101.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:12,253 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:12,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.95 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:12,257 INFO L168 Benchmark]: Boogie Preprocessor took 35.02 ms. Allocated memory is still 156.2 MB. Free memory was 122.3 MB in the beginning and 120.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:12,259 INFO L168 Benchmark]: RCFGBuilder took 540.08 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 108.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:12,260 INFO L168 Benchmark]: TraceAbstraction took 5886.58 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 107.7 MB in the beginning and 137.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:12,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.95 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.02 ms. Allocated memory is still 156.2 MB. Free memory was 122.3 MB in the beginning and 120.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 540.08 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 108.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5886.58 ms. Allocated memory was 156.2 MB in the beginning and 188.7 MB in the end (delta: 32.5 MB). Free memory was 107.7 MB in the beginning and 137.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((len == 0 || (len <= 1 && 1 <= len)) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 126 SDslu, 195 SDs, 0 SdLazy, 507 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 34 PreInvPairs, 44 NumberOfFragments, 99 HoareAnnotationTreeSize, 34 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 419 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 170 ConstructedInterpolants, 0 QuantifiedInterpolants, 14480 SizeOfPredicates, 8 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 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...