/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:33:40,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:33:40,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:33:40,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:33:40,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:33:40,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:33:40,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:33:40,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:33:40,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:33:40,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:33:40,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:33:40,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:33:40,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:33:40,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:33:40,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:33:40,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:33:40,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:33:40,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:33:40,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:33:40,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:33:40,511 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 [2021-05-02 12:33:40,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:33:40,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:33:40,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:33:40,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:33:40,551 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:33:40,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:33:40,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:33:40,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:33:40,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:33:40,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:33:40,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:33:40,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:33:40,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:33:40,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:33:40,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:33:40,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:33:40,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:33:40,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:33:40,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:33:40,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:33:40,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:33:40,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:33:40,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:33:40,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:33:40,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:33:40,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:33:40,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:33:40,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:33:40,901 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:33:40,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-05-02 12:33:40,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50bc4090a/f0d9c49e1dae4442a9ccb290faae9b2d/FLAG75996964a [2021-05-02 12:33:41,391 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:33:41,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-05-02 12:33:41,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50bc4090a/f0d9c49e1dae4442a9ccb290faae9b2d/FLAG75996964a [2021-05-02 12:33:41,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50bc4090a/f0d9c49e1dae4442a9ccb290faae9b2d [2021-05-02 12:33:41,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:33:41,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:33:41,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:41,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:33:41,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:33:41,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:41,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3d6edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41, skipping insertion in model container [2021-05-02 12:33:41,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:41,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:33:41,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:33:41,923 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i[895,908] [2021-05-02 12:33:41,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:41,943 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:33:41,954 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i[895,908] [2021-05-02 12:33:41,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:41,971 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:33:41,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41 WrapperNode [2021-05-02 12:33:41,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:41,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:33:41,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:33:41,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:33:42,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (1/1) ... [2021-05-02 12:33:42,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:33:42,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:33:42,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:33:42,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:33:42,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (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 [2021-05-02 12:33:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:33:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:33:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:33:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:33:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:33:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:33:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:33:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:33:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:33:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:33:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:33:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:33:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:33:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:33:42,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:33:42,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:33:42,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:33:42,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:33:42,433 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:33:42,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:42 BoogieIcfgContainer [2021-05-02 12:33:42,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:33:42,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:33:42,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:33:42,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:33:42,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:33:41" (1/3) ... [2021-05-02 12:33:42,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e43be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:42, skipping insertion in model container [2021-05-02 12:33:42,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:41" (2/3) ... [2021-05-02 12:33:42,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e43be31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:42, skipping insertion in model container [2021-05-02 12:33:42,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:42" (3/3) ... [2021-05-02 12:33:42,456 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2021-05-02 12:33:42,461 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:33:42,464 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:33:42,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:33:42,506 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:33:42,506 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:33:42,506 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:33:42,506 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:33:42,506 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:33:42,506 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:33:42,506 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:33:42,507 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:33:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:33:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:33:42,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:42,529 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:42,529 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -353995685, now seen corresponding path program 1 times [2021-05-02 12:33:42,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:42,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890768234] [2021-05-02 12:33:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:42,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:42,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890768234] [2021-05-02 12:33:42,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890768234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:42,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:42,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:33:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743802985] [2021-05-02 12:33:42,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:33:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:33:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:33:42,833 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:42,907 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 12:33:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:33:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:33:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:42,916 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:33:42,916 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 12:33:42,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:33:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 12:33:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 12:33:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 12:33:42,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 12:33:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:42,958 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 12:33:42,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 12:33:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:33:42,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:42,960 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:42,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:33:42,961 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash -364154416, now seen corresponding path program 1 times [2021-05-02 12:33:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:42,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482245525] [2021-05-02 12:33:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:43,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:43,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:43,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482245525] [2021-05-02 12:33:43,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482245525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:43,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:43,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 12:33:43,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434942249] [2021-05-02 12:33:43,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:33:43,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:43,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:33:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:33:43,225 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:43,497 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 12:33:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:33:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:33:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:43,499 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:33:43,499 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 12:33:43,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 12:33:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-02 12:33:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 12:33:43,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-05-02 12:33:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:43,506 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 12:33:43,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 12:33:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:33:43,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:43,507 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:43,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:33:43,508 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:43,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1324408332, now seen corresponding path program 1 times [2021-05-02 12:33:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:43,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409594452] [2021-05-02 12:33:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:43,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:43,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409594452] [2021-05-02 12:33:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409594452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766701564] [2021-05-02 12:33:43,754 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 [2021-05-02 12:33:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:33:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:44,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:44,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766701564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:44,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:44,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-02 12:33:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613081691] [2021-05-02 12:33:44,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:33:44,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:33:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:33:44,087 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:44,560 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-05-02 12:33:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:33:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 12:33:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:44,562 INFO L225 Difference]: With dead ends: 29 [2021-05-02 12:33:44,562 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 12:33:44,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:33:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 12:33:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-05-02 12:33:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 12:33:44,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 12:33:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:44,571 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 12:33:44,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 12:33:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:33:44,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:44,572 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:44,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:33:44,795 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:44,796 INFO L82 PathProgramCache]: Analyzing trace with hash 528338768, now seen corresponding path program 2 times [2021-05-02 12:33:44,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:44,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392111709] [2021-05-02 12:33:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:44,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392111709] [2021-05-02 12:33:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392111709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606947470] [2021-05-02 12:33:44,974 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 [2021-05-02 12:33:45,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:33:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:33:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:45,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:45,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606947470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:45,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:45,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-02 12:33:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207807145] [2021-05-02 12:33:45,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:33:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:33:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:33:45,236 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:46,066 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-02 12:33:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:33:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:33:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:46,069 INFO L225 Difference]: With dead ends: 35 [2021-05-02 12:33:46,069 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 12:33:46,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:33:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 12:33:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-05-02 12:33:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 12:33:46,082 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-05-02 12:33:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:46,082 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 12:33:46,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 12:33:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 12:33:46,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:46,084 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:46,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:46,301 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1485500982, now seen corresponding path program 1 times [2021-05-02 12:33:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:46,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108738995] [2021-05-02 12:33:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:46,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 12:33:46,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108738995] [2021-05-02 12:33:46,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108738995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976682582] [2021-05-02 12:33:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 12:33:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:33:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:46,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:46,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976682582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:46,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:46,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-02 12:33:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609153821] [2021-05-02 12:33:46,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:33:46,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:46,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:33:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:33:46,793 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:47,687 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-02 12:33:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:33:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 12:33:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:47,688 INFO L225 Difference]: With dead ends: 33 [2021-05-02 12:33:47,688 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:33:47,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:33:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:33:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:33:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:33:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:33:47,690 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-05-02 12:33:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:47,690 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:33:47,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:33:47,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:33:47,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:47,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:33:48,072 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:33:48,072 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:33:48,072 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:33:48,072 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:48,072 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:33:48,072 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:33:48,073 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 40) the Hoare annotation is: true [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point L29(lines 29 35) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point L27(line 27) no Hoare annotation was computed. [2021-05-02 12:33:48,073 INFO L198 CegarLoopUtils]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (< .cse0 (+ (* 3 main_~n~0) 1)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2021-05-02 12:33:48,074 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (< .cse0 (+ .cse1 1)) (<= .cse1 .cse0))) [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 40) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 40) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:33:48,074 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:33:48,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:33:48 BoogieIcfgContainer [2021-05-02 12:33:48,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:33:48,085 INFO L168 Benchmark]: Toolchain (without parser) took 6290.94 ms. Allocated memory was 207.6 MB in the beginning and 254.8 MB in the end (delta: 47.2 MB). Free memory was 171.9 MB in the beginning and 114.9 MB in the end (delta: 56.9 MB). Peak memory consumption was 104.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:48,085 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 207.6 MB. Free memory is still 188.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:33:48,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.60 ms. Allocated memory is still 207.6 MB. Free memory was 171.7 MB in the beginning and 162.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:48,085 INFO L168 Benchmark]: Boogie Preprocessor took 81.73 ms. Allocated memory is still 207.6 MB. Free memory was 162.0 MB in the beginning and 190.4 MB in the end (delta: -28.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:48,086 INFO L168 Benchmark]: RCFGBuilder took 379.36 ms. Allocated memory is still 207.6 MB. Free memory was 190.4 MB in the beginning and 175.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:48,086 INFO L168 Benchmark]: TraceAbstraction took 5648.82 ms. Allocated memory was 207.6 MB in the beginning and 254.8 MB in the end (delta: 47.2 MB). Free memory was 174.7 MB in the beginning and 114.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:48,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 207.6 MB. Free memory is still 188.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 172.60 ms. Allocated memory is still 207.6 MB. Free memory was 171.7 MB in the beginning and 162.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.73 ms. Allocated memory is still 207.6 MB. Free memory was 162.0 MB in the beginning and 190.4 MB in the end (delta: -28.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 379.36 ms. Allocated memory is still 207.6 MB. Free memory was 190.4 MB in the beginning and 175.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5648.82 ms. Allocated memory was 207.6 MB in the beginning and 254.8 MB in the end (delta: 47.2 MB). Free memory was 174.7 MB in the beginning and 114.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5389.5ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 11.0ms, AutomataDifference: 2589.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 177.8ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 108 SDslu, 185 SDs, 0 SdLazy, 638 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 427.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2780.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 26 NumberOfFragments, 70 HoareAnnotationTreeSize, 14 FomulaSimplifications, 399 FormulaSimplificationTreeSizeReduction, 84.4ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 594 FormulaSimplificationTreeSizeReductionInter, 84.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 60.3ms SsaConstructionTime, 180.4ms SatisfiabilityAnalysisTime, 1596.9ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 1025 SizeOfPredicates, 6 NumberOfNonLiveVariables, 308 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b < 3 * n + 1 && 3 * i <= a + b) && a + b <= 3 * i RESULT: Ultimate proved your program to be correct! Received shutdown request...