/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/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:06:26,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:06:26,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:06:26,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:06:26,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:06:26,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:06:26,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:06:26,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:06:26,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:06:26,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:06:26,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:06:26,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:06:26,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:06:26,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:06:26,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:06:26,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:06:26,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:06:26,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:06:26,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:06:26,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:06:26,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:06:26,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:06:26,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:06:26,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:06:26,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:06:26,918 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:06:26,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:06:27,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:06:27,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:06:27,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:06:27,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:06:27,193 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:06:27,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2021-05-03 00:06:27,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aa7006/1a21053b5fdf434a8ec9b2c581267651/FLAG2fa8f789f [2021-05-03 00:06:27,596 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:06:27,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2021-05-03 00:06:27,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aa7006/1a21053b5fdf434a8ec9b2c581267651/FLAG2fa8f789f [2021-05-03 00:06:27,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aa7006/1a21053b5fdf434a8ec9b2c581267651 [2021-05-03 00:06:27,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:06:27,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:06:27,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:06:27,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:06:27,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:06:27,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffa3849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27, skipping insertion in model container [2021-05-03 00:06:27,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:06:27,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:06:27,767 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2021-05-03 00:06:27,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:06:27,784 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:06:27,829 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2021-05-03 00:06:27,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:06:27,843 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:06:27,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27 WrapperNode [2021-05-03 00:06:27,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:06:27,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:06:27,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:06:27,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:06:27,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (1/1) ... [2021-05-03 00:06:27,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:06:27,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:06:27,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:06:27,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:06:27,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (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 [2021-05-03 00:06:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:06:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:06:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:06:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:06:27,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:06:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:06:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:06:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:06:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:06:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:06:28,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:06:28,142 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:06:28,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:06:28 BoogieIcfgContainer [2021-05-03 00:06:28,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:06:28,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:06:28,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:06:28,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:06:28,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:06:27" (1/3) ... [2021-05-03 00:06:28,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673dd286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:06:28, skipping insertion in model container [2021-05-03 00:06:28,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:06:27" (2/3) ... [2021-05-03 00:06:28,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673dd286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:06:28, skipping insertion in model container [2021-05-03 00:06:28,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:06:28" (3/3) ... [2021-05-03 00:06:28,148 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2021-05-03 00:06:28,152 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:06:28,155 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:06:28,165 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:06:28,178 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:06:28,178 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:06:28,178 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:06:28,178 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:06:28,178 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:06:28,178 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:06:28,178 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:06:28,178 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:06:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-03 00:06:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:06:28,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:28,207 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:28,207 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2021-05-03 00:06:28,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:28,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254216325] [2021-05-03 00:06:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:28,263 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:06:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:28,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:28,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254216325] [2021-05-03 00:06:28,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254216325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:28,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:28,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:06:28,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002818372] [2021-05-03 00:06:28,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:06:28,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:28,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:06:28,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:06:28,450 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.3333333333333335) 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) [2021-05-03 00:06:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:28,502 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-03 00:06:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:06:28,504 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 [2021-05-03 00:06:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:28,507 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:06:28,507 INFO L226 Difference]: Without dead ends: 14 [2021-05-03 00:06:28,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:06:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-03 00:06:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-03 00:06:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-05-03 00:06:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-03 00:06:28,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-03 00:06:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:28,545 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-03 00:06:28,545 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) [2021-05-03 00:06:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-03 00:06:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:06:28,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:28,546 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:28,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:06:28,547 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2021-05-03 00:06:28,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:28,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741238763] [2021-05-03 00:06:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:28,558 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:06:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:28,637 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:28,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741238763] [2021-05-03 00:06:28,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741238763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:28,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:28,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:06:28,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918322224] [2021-05-03 00:06:28,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:06:28,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:06:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:06:28,639 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2021-05-03 00:06:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:28,729 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-03 00:06:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:06:28,729 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 [2021-05-03 00:06:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:28,730 INFO L225 Difference]: With dead ends: 22 [2021-05-03 00:06:28,730 INFO L226 Difference]: Without dead ends: 17 [2021-05-03 00:06:28,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:06:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-03 00:06:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-03 00:06:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-05-03 00:06:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-03 00:06:28,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-03 00:06:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:28,735 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-03 00:06:28,735 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) [2021-05-03 00:06:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-03 00:06:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:06:28,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:28,736 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:28,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:06:28,736 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1854346422, now seen corresponding path program 1 times [2021-05-03 00:06:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:28,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795603829] [2021-05-03 00:06:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:28,765 INFO L181 rdanLoopAcceleration]: Guard: Formula: (let ((.cse0 (mod v_main_~x~0_9 4294967296))) (and (< .cse0 (mod v_main_~y~0_4 4294967296)) (<= 5000000 .cse0))) InVars {main_~y~0=v_main_~y~0_4, main_~x~0=v_main_~x~0_9} OutVars{main_~y~0=v_main_~y~0_4, main_~x~0=v_main_~x~0_9} AuxVars[] AssignedVars[] [2021-05-03 00:06:28,776 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 91.7 percent of original size [2021-05-03 00:06:28,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:28,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:32,838 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-03 00:06:36,854 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-03 00:06:40,882 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-03 00:06:40,914 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-03 00:06:40,933 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-03 00:06:40,979 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 91.7 percent of original size 100 [2021-05-03 00:06:41,009 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:06:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:41,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:06:41,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:41,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795603829] [2021-05-03 00:06:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795603829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:41,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:41,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:06:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476377691] [2021-05-03 00:06:41,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:06:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:06:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 00:06:41,140 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-05-03 00:06:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:41,231 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-03 00:06:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:06:41,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 [2021-05-03 00:06:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:41,232 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:06:41,232 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:06:41,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:06:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:06:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-03 00:06:41,236 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) [2021-05-03 00:06:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-03 00:06:41,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2021-05-03 00:06:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:41,236 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-03 00:06:41,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-05-03 00:06:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-03 00:06:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:06:41,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:41,237 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:41,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:06:41,237 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2021-05-03 00:06:41,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:41,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649593625] [2021-05-03 00:06:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:41,247 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (mod v_main_~x~0_12 4294967296) 5000000) (< (mod (+ v_main_~x~0_12 1) 4294967296) (mod v_main_~y~0_5 4294967296))) InVars {main_~x~0=v_main_~x~0_12, main_~y~0=v_main_~y~0_5} OutVars{main_~x~0=v_main_~x~0_12, main_~y~0=v_main_~y~0_5} AuxVars[] AssignedVars[] [2021-05-03 00:06:41,251 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 91.4 percent of original size [2021-05-03 00:06:41,253 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:41,256 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:43,735 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-03 00:06:45,079 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:06:49,092 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-03 00:06:49,163 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-03 00:06:49,180 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-03 00:06:49,280 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 91.4 percent of original size 96 [2021-05-03 00:06:49,440 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 00:06:49,445 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:06:49,448 INFO L181 rdanLoopAcceleration]: Guard: Formula: (let ((.cse0 (mod v_main_~x~0_14 4294967296))) (and (< .cse0 5000000) (< .cse0 (mod v_main_~y~0_6 4294967296)))) InVars {main_~x~0=v_main_~x~0_14, main_~y~0=v_main_~y~0_6} OutVars{main_~x~0=v_main_~x~0_14, main_~y~0=v_main_~y~0_6} AuxVars[] AssignedVars[] [2021-05-03 00:06:49,451 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.9 percent of original size [2021-05-03 00:06:49,452 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:49,455 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:53,469 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-03 00:06:57,481 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-03 00:07:01,490 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 00:07:01,531 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-03 00:07:01,542 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-03 00:07:01,588 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.9 percent of original size 90 [2021-05-03 00:07:01,630 INFO L181 rdanLoopAcceleration]: Guard: Formula: (let ((.cse0 (mod v_main_~x~0_16 4294967296))) (and (< .cse0 (mod v_main_~y~0_7 4294967296)) (<= 5000000 .cse0))) InVars {main_~y~0=v_main_~y~0_7, main_~x~0=v_main_~x~0_16} OutVars{main_~y~0=v_main_~y~0_7, main_~x~0=v_main_~x~0_16} AuxVars[] AssignedVars[] [2021-05-03 00:07:01,634 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 91.7 percent of original size [2021-05-03 00:07:01,636 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,639 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,798 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-03 00:07:01,840 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-03 00:07:01,848 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-03 00:07:01,931 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 91.7 percent of original size 100 [2021-05-03 00:07:01,962 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:02,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:07:02,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:02,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:07:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649593625] [2021-05-03 00:07:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [649593625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:07:02,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:07:02,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:07:02,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480742042] [2021-05-03 00:07:02,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:07:02,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:07:02,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:07:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:07:02,280 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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) [2021-05-03 00:07:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:02,675 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-03 00:07:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:07:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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 [2021-05-03 00:07:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:02,676 INFO L225 Difference]: With dead ends: 30 [2021-05-03 00:07:02,676 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 00:07:02,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:07:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 00:07:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 00:07:02,679 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) [2021-05-03 00:07:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 00:07:02,679 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-03 00:07:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:02,679 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 00:07:02,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 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) [2021-05-03 00:07:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 00:07:02,679 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 00:07:02,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:07:02,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-03 00:07:02,925 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-03 00:07:02,926 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-03 00:07:02,926 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-03 00:07:02,926 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 6 17) the Hoare annotation is: true [2021-05-03 00:07:02,927 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 6 17) the Hoare annotation is: true [2021-05-03 00:07:02,929 INFO L201 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-05-03 00:07:02,929 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 6 17) the Hoare annotation is: true [2021-05-03 00:07:02,929 INFO L194 CegarLoopUtils]: At program point L11(lines 11 12) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-03 00:07:02,929 INFO L194 CegarLoopUtils]: At program point L11-2(lines 11 12) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-03 00:07:02,929 INFO L194 CegarLoopUtils]: At program point L10-2(lines 10 14) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-03 00:07:02,933 INFO L194 CegarLoopUtils]: At program point L10-3(lines 10 14) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-03 00:07:02,933 INFO L201 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-05-03 00:07:02,933 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2021-05-03 00:07:02,933 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(line 4) the Hoare annotation is: true [2021-05-03 00:07:02,933 INFO L194 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-03 00:07:02,934 INFO L194 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-03 00:07:02,934 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-03 00:07:02,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:07:02 BoogieIcfgContainer [2021-05-03 00:07:02,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:07:02,948 INFO L168 Benchmark]: Toolchain (without parser) took 35327.43 ms. Allocated memory is still 213.9 MB. Free memory was 178.3 MB in the beginning and 186.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 106.3 MB. Max. memory is 8.0 GB. [2021-05-03 00:07:02,948 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 213.9 MB. Free memory is still 194.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:07:02,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.26 ms. Allocated memory is still 213.9 MB. Free memory was 178.1 MB in the beginning and 196.8 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:07:02,950 INFO L168 Benchmark]: Boogie Preprocessor took 33.74 ms. Allocated memory is still 213.9 MB. Free memory was 196.8 MB in the beginning and 195.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:07:02,950 INFO L168 Benchmark]: RCFGBuilder took 263.88 ms. Allocated memory is still 213.9 MB. Free memory was 195.4 MB in the beginning and 182.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:07:02,951 INFO L168 Benchmark]: TraceAbstraction took 34803.36 ms. Allocated memory is still 213.9 MB. Free memory was 182.1 MB in the beginning and 186.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 109.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:07:02,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 213.9 MB. Free memory is still 194.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 219.26 ms. Allocated memory is still 213.9 MB. Free memory was 178.1 MB in the beginning and 196.8 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.74 ms. Allocated memory is still 213.9 MB. Free memory was 196.8 MB in the beginning and 195.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 263.88 ms. Allocated memory is still 213.9 MB. Free memory was 195.4 MB in the beginning and 182.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34803.36 ms. Allocated memory is still 213.9 MB. Free memory was 182.1 MB in the beginning and 186.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 109.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34503.8ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.3ms, AutomataDifference: 655.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 245.4ms, InitialAbstractionConstructionTime: 20.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 75 SDslu, 76 SDs, 0 SdLazy, 178 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 691.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 51 PreInvPairs, 81 NumberOfFragments, 86 HoareAnnotationTreeSize, 51 FomulaSimplifications, 211 FormulaSimplificationTreeSizeReduction, 65.2ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 889 FormulaSimplificationTreeSizeReductionInter, 171.2ms 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: 10]: Loop Invariant Derived loop invariant: z <= 2 * (z / 2) - ProcedureContractResult [Line: 6]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...