/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:35:55,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:35:55,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:35:55,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:35:55,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:35:55,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:35:55,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:35:55,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:35:55,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:35:55,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:35:55,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:35:55,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:35:55,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:35:55,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:35:55,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:35:55,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:35:55,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:35:55,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:35:55,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:35:55,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:35:55,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:35:55,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:35:55,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:35:55,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:35:55,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:35:55,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:35:55,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:35:55,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:35:55,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:35:55,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:35:55,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:35:55,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:35:55,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:35:55,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:35:55,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:35:55,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:35:55,939 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:35:55,939 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:35:56,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:35:56,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:35:56,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:35:56,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:35:56,448 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:35:56,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-05-06 11:35:56,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7d3d42e/5b62efdea36f44859fcf43944577fcad/FLAGcaa014ee4 [2021-05-06 11:35:56,951 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:35:56,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-05-06 11:35:56,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7d3d42e/5b62efdea36f44859fcf43944577fcad/FLAGcaa014ee4 [2021-05-06 11:35:56,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7d3d42e/5b62efdea36f44859fcf43944577fcad [2021-05-06 11:35:56,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:35:56,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:35:56,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:35:56,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:35:56,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:35:56,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:35:56" (1/1) ... [2021-05-06 11:35:56,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b9efd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:56, skipping insertion in model container [2021-05-06 11:35:56,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:35:56" (1/1) ... [2021-05-06 11:35:56,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:35:57,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:35:57,124 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/gj2007b.i[895,908] [2021-05-06 11:35:57,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:35:57,138 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:35:57,149 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/gj2007b.i[895,908] [2021-05-06 11:35:57,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:35:57,163 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:35:57,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57 WrapperNode [2021-05-06 11:35:57,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:35:57,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:35:57,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:35:57,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:35:57,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (1/1) ... [2021-05-06 11:35:57,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:35:57,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:35:57,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:35:57,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:35:57,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (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 [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:35:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:35:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:35:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:35:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:35:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:35:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:35:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:35:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:35:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:35:57,465 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:35:57,465 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:35:57,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:35:57 BoogieIcfgContainer [2021-05-06 11:35:57,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:35:57,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:35:57,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:35:57,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:35:57,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:35:56" (1/3) ... [2021-05-06 11:35:57,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508e2062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:35:57, skipping insertion in model container [2021-05-06 11:35:57,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:35:57" (2/3) ... [2021-05-06 11:35:57,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508e2062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:35:57, skipping insertion in model container [2021-05-06 11:35:57,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:35:57" (3/3) ... [2021-05-06 11:35:57,490 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-05-06 11:35:57,495 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:35:57,498 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:35:57,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:35:57,567 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:35:57,567 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:35:57,567 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:35:57,567 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:35:57,567 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:35:57,567 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:35:57,568 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:35:57,568 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:35:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 11:35:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:35:57,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:57,601 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:57,602 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -915508507, now seen corresponding path program 1 times [2021-05-06 11:35:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:57,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988399616] [2021-05-06 11:35:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:57,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:57,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:57,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:57,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988399616] [2021-05-06 11:35:57,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988399616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:57,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:57,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:35:57,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45881775] [2021-05-06 11:35:57,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:35:57,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:35:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:35:57,909 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 11:35:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:57,988 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-06 11:35:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:35:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 11:35:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:57,996 INFO L225 Difference]: With dead ends: 35 [2021-05-06 11:35:57,996 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:35:57,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:35:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:35:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 11:35:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:35:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 11:35:58,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 11:35:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:58,047 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 11:35:58,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 11:35:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 11:35:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:35:58,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:58,049 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:58,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:35:58,050 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash -925667238, now seen corresponding path program 1 times [2021-05-06 11:35:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:58,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499468691] [2021-05-06 11:35:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:58,060 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:58,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:58,214 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:58,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499468691] [2021-05-06 11:35:58,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [499468691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:58,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:58,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:35:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899560779] [2021-05-06 11:35:58,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:35:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:58,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:35:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:35:58,219 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-05-06 11:35:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:58,418 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 11:35:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:35:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-06 11:35:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:58,420 INFO L225 Difference]: With dead ends: 28 [2021-05-06 11:35:58,420 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:35:58,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:35:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:35:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:35:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 11:35:58,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-05-06 11:35:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:58,442 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 11:35:58,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-05-06 11:35:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 11:35:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:35:58,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:58,444 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:58,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:35:58,444 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1147629988, now seen corresponding path program 1 times [2021-05-06 11:35:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:58,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795539033] [2021-05-06 11:35:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:58,513 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-06 11:35:58,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:35:58,564 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:35:58,582 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-06 11:35:58,591 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-05-06 11:35:58,610 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-06 11:35:58,639 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:35:58,643 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:35:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:58,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:58,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:35:58,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:35:58,861 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:58,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795539033] [2021-05-06 11:35:58,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795539033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:58,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:58,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:35:58,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441643233] [2021-05-06 11:35:58,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:35:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:35:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:35:58,863 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-05-06 11:35:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:59,376 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-05-06 11:35:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:35:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 14 [2021-05-06 11:35:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:59,380 INFO L225 Difference]: With dead ends: 47 [2021-05-06 11:35:59,381 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 11:35:59,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:35:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 11:35:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-05-06 11:35:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 11:35:59,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-05-06 11:35:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:59,393 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 11:35:59,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-05-06 11:35:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 11:35:59,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:35:59,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:59,394 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:59,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:35:59,394 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1885482061, now seen corresponding path program 1 times [2021-05-06 11:35:59,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:59,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406028396] [2021-05-06 11:35:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:59,397 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:59,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:59,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-06 11:35:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:59,483 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:59,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406028396] [2021-05-06 11:35:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406028396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:59,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:35:59,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786093279] [2021-05-06 11:35:59,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:35:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:35:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:35:59,485 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:35:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:59,657 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-05-06 11:35:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:35:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-05-06 11:35:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:59,659 INFO L225 Difference]: With dead ends: 44 [2021-05-06 11:35:59,659 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:35:59,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:35:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:35:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-05-06 11:35:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:35:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-05-06 11:35:59,666 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2021-05-06 11:35:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:59,666 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-05-06 11:35:59,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:35:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-05-06 11:35:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:35:59,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:59,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:59,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:35:59,667 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:59,668 INFO L82 PathProgramCache]: Analyzing trace with hash 427578968, now seen corresponding path program 1 times [2021-05-06 11:35:59,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:59,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400602385] [2021-05-06 11:35:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:59,673 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:35:59,673 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:35:59,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:35:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:59,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:35:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:35:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:35:59,740 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:35:59,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400602385] [2021-05-06 11:35:59,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [400602385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:35:59,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:35:59,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:35:59,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616187949] [2021-05-06 11:35:59,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:35:59,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:35:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:35:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:35:59,742 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-05-06 11:35:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:35:59,969 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-06 11:35:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:35:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2021-05-06 11:35:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:35:59,971 INFO L225 Difference]: With dead ends: 49 [2021-05-06 11:35:59,971 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 11:35:59,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:35:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 11:35:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2021-05-06 11:35:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:35:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-06 11:35:59,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-05-06 11:35:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:35:59,987 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-06 11:35:59,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-05-06 11:35:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-06 11:35:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:35:59,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:35:59,988 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:35:59,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:35:59,988 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:35:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:35:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1930189671, now seen corresponding path program 1 times [2021-05-06 11:35:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:35:59,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504535127] [2021-05-06 11:35:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:35:59,997 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 90.2 percent of original size [2021-05-06 11:36:00,012 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:00,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:00,017 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-05-06 11:36:00,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-06 11:36:00,036 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 90.2 percent of original size 55 [2021-05-06 11:36:00,050 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:36:00,053 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:36:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 11:36:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:00,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:36:00,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:00,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504535127] [2021-05-06 11:36:00,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [504535127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:00,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:00,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:36:00,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550636123] [2021-05-06 11:36:00,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:36:00,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:36:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:36:00,160 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:00,400 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-06 11:36:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:36:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-06 11:36:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:00,401 INFO L225 Difference]: With dead ends: 37 [2021-05-06 11:36:00,401 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 11:36:00,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:36:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 11:36:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 11:36:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 11:36:00,408 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-05-06 11:36:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:00,408 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 11:36:00,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 11:36:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:36:00,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:00,409 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:00,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:36:00,409 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 987198129, now seen corresponding path program 1 times [2021-05-06 11:36:00,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:00,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998380743] [2021-05-06 11:36:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:00,415 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:00,415 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:36:00,416 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 11:36:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:00,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998380743] [2021-05-06 11:36:00,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [998380743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:00,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:00,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:36:00,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223925506] [2021-05-06 11:36:00,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:36:00,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:00,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:36:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:36:00,476 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:00,636 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-05-06 11:36:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:36:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 11:36:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:00,637 INFO L225 Difference]: With dead ends: 44 [2021-05-06 11:36:00,637 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 11:36:00,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:36:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 11:36:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-05-06 11:36:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-05-06 11:36:00,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2021-05-06 11:36:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:00,645 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-05-06 11:36:00,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-05-06 11:36:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:36:00,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:00,646 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:00,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:36:00,646 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash -550830987, now seen corresponding path program 2 times [2021-05-06 11:36:00,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:00,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648454877] [2021-05-06 11:36:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:00,654 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:36:00,655 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-06 11:36:00,656 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 11:36:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:00,712 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:00,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648454877] [2021-05-06 11:36:00,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [648454877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:00,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:00,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:36:00,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009035548] [2021-05-06 11:36:00,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:36:00,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:00,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:36:00,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:36:00,714 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:00,881 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 11:36:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:36:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 11:36:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:00,882 INFO L225 Difference]: With dead ends: 33 [2021-05-06 11:36:00,882 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:36:00,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:36:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:36:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:36:00,883 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) [2021-05-06 11:36:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:36:00,883 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-05-06 11:36:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:00,883 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:36:00,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:36:00,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:36:00,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:36:00,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:36:01,432 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-05-06 11:36:01,703 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2021-05-06 11:36:01,712 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-06 11:36:01,712 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-06 11:36:01,712 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-06 11:36:01,712 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,712 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)|)) [2021-05-06 11:36:01,712 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,712 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,713 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,713 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,713 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:36:01,713 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-06 11:36:01,713 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:36:01,713 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:36:01,713 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:36:01,713 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2021-05-06 11:36:01,713 INFO L194 CegarLoopUtils]: At program point L29(lines 29 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= (+ main_~m~0 1) main_~n~0))) (or (and .cse0 (<= 1 main_~x~0) .cse1 (<= (+ main_~x~0 1) main_~n~0)) (and .cse0 .cse1 (<= 0 (+ |main_#t~nondet4| 2147483648)) (<= |main_#t~nondet4| 2147483647) (= main_~x~0 0)))) [2021-05-06 11:36:01,713 INFO L194 CegarLoopUtils]: At program point L29-2(lines 29 31) the Hoare annotation is: (and (<= (+ main_~m~0 1) main_~n~0) (<= (+ main_~x~0 1) main_~n~0) (let ((.cse0 (or (<= 0 main_~m~0) (<= main_~n~0 0)))) (or (and .cse0 (= main_~x~0 0)) (and (<= 1 main_~x~0) .cse0)))) [2021-05-06 11:36:01,713 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 33) the Hoare annotation is: (let ((.cse1 (or (<= 0 main_~m~0) (<= main_~n~0 0))) (.cse5 (+ main_~m~0 1))) (let ((.cse2 (= main_~m~0 0)) (.cse0 (<= 1 main_~x~0)) (.cse4 (<= .cse5 main_~n~0)) (.cse3 (or (and (= .cse5 main_~x~0) (< main_~m~0 main_~n~0) (< 0 main_~m~0)) (and .cse1 (= main_~x~0 0))))) (or (and .cse0 .cse1 .cse2) (and .cse2 .cse3) (and .cse0 .cse4 .cse1) (and .cse4 .cse3)))) [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 33) the Hoare annotation is: (let ((.cse2 (<= main_~n~0 0))) (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (or (<= 0 main_~m~0) .cse2))) (or (and .cse0 .cse1 (= main_~m~0 0)) (and .cse2 (= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1)))) [2021-05-06 11:36:01,714 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 24 37) the Hoare annotation is: true [2021-05-06 11:36:01,714 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 24 37) the Hoare annotation is: true [2021-05-06 11:36:01,714 INFO L201 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0))) (or (and .cse0 (<= (+ main_~m~0 1) main_~n~0)) (and .cse0 (= main_~m~0 0)) (and (<= main_~n~0 0) (= main_~x~0 0)))) [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:36:01,714 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:36:01,714 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:36:01,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:36:01 BoogieIcfgContainer [2021-05-06 11:36:01,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:36:01,728 INFO L168 Benchmark]: Toolchain (without parser) took 4744.65 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 145.2 MB in the beginning and 85.5 MB in the end (delta: 59.7 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. [2021-05-06 11:36:01,728 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory was 161.9 MB in the beginning and 161.8 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:36:01,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.63 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 135.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:36:01,729 INFO L168 Benchmark]: Boogie Preprocessor took 31.21 ms. Allocated memory is still 179.3 MB. Free memory was 135.4 MB in the beginning and 133.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:36:01,729 INFO L168 Benchmark]: RCFGBuilder took 269.46 ms. Allocated memory is still 179.3 MB. Free memory was 133.9 MB in the beginning and 149.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-06 11:36:01,729 INFO L168 Benchmark]: TraceAbstraction took 4259.07 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 149.2 MB in the beginning and 85.5 MB in the end (delta: 63.8 MB). Peak memory consumption was 112.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:36:01,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory was 161.9 MB in the beginning and 161.8 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 179.63 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 135.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.21 ms. Allocated memory is still 179.3 MB. Free memory was 135.4 MB in the beginning and 133.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 269.46 ms. Allocated memory is still 179.3 MB. Free memory was 133.9 MB in the beginning and 149.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4259.07 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 149.2 MB in the beginning and 85.5 MB in the end (delta: 63.8 MB). Peak memory consumption was 112.6 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: 3319.0ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 12.8ms, AutomataDifference: 1805.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 827.6ms, InitialAbstractionConstructionTime: 24.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 191 SDslu, 213 SDs, 0 SdLazy, 582 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 477.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1353.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=7, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 100.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 22 LocationsWithAnnotation, 88 PreInvPairs, 151 NumberOfFragments, 289 HoareAnnotationTreeSize, 88 FomulaSimplifications, 13526 FormulaSimplificationTreeSizeReduction, 246.6ms HoareSimplificationTime, 22 FomulaSimplificationsInter, 3947 FormulaSimplificationTreeSizeReductionInter, 566.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: ((((1 <= x && (0 <= m || n <= 0)) && m == 0) || (m == 0 && (((m + 1 == x && m < n) && 0 < m) || ((0 <= m || n <= 0) && x == 0)))) || ((1 <= x && m + 1 <= n) && (0 <= m || n <= 0))) || (m + 1 <= n && (((m + 1 == x && m < n) && 0 < m) || ((0 <= m || n <= 0) && x == 0))) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...