/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/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:15:19,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:15:19,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:15:19,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:15:20,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:15:20,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:15:20,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:15:20,070 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 00:15:20,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:15:20,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:15:20,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:15:20,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:15:20,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:15:20,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:15:20,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:15:20,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:15:20,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:15:20,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:15:20,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:15:20,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:15:20,086 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:15:20,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:15:20,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:15:20,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:15:20,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:15:20,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:15:20,435 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:15:20,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-03 00:15:20,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4304ea5ec/82cfc0985d49403eba1d12387d110dca/FLAG3458f7262 [2021-05-03 00:15:20,996 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:15:20,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2021-05-03 00:15:21,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4304ea5ec/82cfc0985d49403eba1d12387d110dca/FLAG3458f7262 [2021-05-03 00:15:21,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4304ea5ec/82cfc0985d49403eba1d12387d110dca [2021-05-03 00:15:21,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:15:21,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:15:21,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:15:21,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:15:21,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:15:21,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2700feec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21, skipping insertion in model container [2021-05-03 00:15:21,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:15:21,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:15:21,658 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/nested3-2.c[321,334] [2021-05-03 00:15:21,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:15:21,673 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:15:21,712 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/nested3-2.c[321,334] [2021-05-03 00:15:21,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:15:21,761 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:15:21,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21 WrapperNode [2021-05-03 00:15:21,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:15:21,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:15:21,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:15:21,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:15:21,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (1/1) ... [2021-05-03 00:15:21,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:15:21,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:15:21,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:15:21,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:15:21,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (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 00:15:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:15:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:15:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:15:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:15:21,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:15:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:15:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:15:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:15:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:15:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:15:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:15:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:15:21,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:15:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:15:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:15:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:15:21,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:15:22,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:15:22,287 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 00:15:22,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:15:22 BoogieIcfgContainer [2021-05-03 00:15:22,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:15:22,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:15:22,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:15:22,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:15:22,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:15:21" (1/3) ... [2021-05-03 00:15:22,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c32492b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:15:22, skipping insertion in model container [2021-05-03 00:15:22,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:21" (2/3) ... [2021-05-03 00:15:22,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c32492b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:15:22, skipping insertion in model container [2021-05-03 00:15:22,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:15:22" (3/3) ... [2021-05-03 00:15:22,324 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2021-05-03 00:15:22,330 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:15:22,334 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:15:22,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:15:22,406 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:15:22,407 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:15:22,407 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:15:22,407 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:15:22,407 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:15:22,407 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:15:22,408 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:15:22,408 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:15:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-03 00:15:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:15:22,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:22,435 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:22,435 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2021-05-03 00:15:22,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:22,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575154894] [2021-05-03 00:15:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:22,500 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:22,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:22,750 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 00:15:22,751 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575154894] [2021-05-03 00:15:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1575154894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:22,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:22,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:15:22,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308224116] [2021-05-03 00:15:22,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:15:22,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:15:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:15:22,774 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 00:15:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:22,881 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2021-05-03 00:15:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:15:22,884 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 00:15:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:22,892 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:15:22,893 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:15:22,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:15:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:15:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:15:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-03 00:15:22,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-05-03 00:15:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:22,941 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-03 00:15:22,941 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 00:15:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-03 00:15:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:15:22,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:22,943 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:22,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:15:22,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2021-05-03 00:15:22,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:22,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171688809] [2021-05-03 00:15:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:22,947 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,066 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 00:15:23,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:23,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171688809] [2021-05-03 00:15:23,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171688809] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:23,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:23,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:23,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144905172] [2021-05-03 00:15:23,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:23,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:23,070 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 00:15:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:23,231 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-03 00:15:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 00:15:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:23,233 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:15:23,233 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:15:23,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:15:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-05-03 00:15:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-03 00:15:23,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-05-03 00:15:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:23,242 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-03 00:15:23,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 00:15:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-03 00:15:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:15:23,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:23,243 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:23,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:15:23,243 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2021-05-03 00:15:23,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:23,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290393878] [2021-05-03 00:15:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:23,246 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,319 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 00:15:23,319 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290393878] [2021-05-03 00:15:23,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [290393878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:23,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:23,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:23,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240104519] [2021-05-03 00:15:23,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:23,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:23,322 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:23,407 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-03 00:15:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:23,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:15:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:23,408 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:15:23,408 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:15:23,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:15:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-03 00:15:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-03 00:15:23,414 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-05-03 00:15:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:23,414 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-03 00:15:23,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-03 00:15:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:15:23,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:23,415 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:23,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:15:23,415 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2021-05-03 00:15:23,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:23,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303523241] [2021-05-03 00:15:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:23,418 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,468 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 00:15:23,468 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:23,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303523241] [2021-05-03 00:15:23,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303523241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:23,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:23,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:23,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122033447] [2021-05-03 00:15:23,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:23,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:23,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:23,470 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 00:15:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:23,537 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-03 00:15:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-05-03 00:15:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:23,538 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:15:23,538 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:15:23,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:15:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-03 00:15:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-05-03 00:15:23,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-05-03 00:15:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:23,544 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-05-03 00:15:23,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 00:15:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-05-03 00:15:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:15:23,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:23,545 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:23,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:15:23,545 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2021-05-03 00:15:23,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:23,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432289389] [2021-05-03 00:15:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:23,570 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_9 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_9} OutVars{main_~z~0=v_main_~z~0_9} AuxVars[] AssignedVars[] [2021-05-03 00:15:23,576 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:23,578 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:23,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:23,672 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:23,697 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-03 00:15:23,730 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-03 00:15:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-03 00:15:23,745 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-03 00:15:23,774 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-03 00:15:23,774 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:15:23,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:15:23,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:15:23 BoogieIcfgContainer [2021-05-03 00:15:23,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:15:23,787 INFO L168 Benchmark]: Toolchain (without parser) took 2287.78 ms. Allocated memory was 195.0 MB in the beginning and 280.0 MB in the end (delta: 84.9 MB). Free memory was 160.0 MB in the beginning and 250.4 MB in the end (delta: -90.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:15:23,787 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:15:23,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.23 ms. Allocated memory is still 195.0 MB. Free memory was 159.8 MB in the beginning and 178.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:15:23,788 INFO L168 Benchmark]: Boogie Preprocessor took 38.29 ms. Allocated memory is still 195.0 MB. Free memory was 178.1 MB in the beginning and 177.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:15:23,788 INFO L168 Benchmark]: RCFGBuilder took 510.90 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:15:23,789 INFO L168 Benchmark]: TraceAbstraction took 1470.40 ms. Allocated memory was 195.0 MB in the beginning and 280.0 MB in the end (delta: 84.9 MB). Free memory was 162.4 MB in the beginning and 250.4 MB in the end (delta: -88.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:15:23,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 195.0 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.23 ms. Allocated memory is still 195.0 MB. Free memory was 159.8 MB in the beginning and 178.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.29 ms. Allocated memory is still 195.0 MB. Free memory was 178.1 MB in the beginning and 177.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 510.90 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1470.40 ms. Allocated memory was 195.0 MB in the beginning and 280.0 MB in the end (delta: 84.9 MB). Free memory was 162.4 MB in the beginning and 250.4 MB in the end (delta: -88.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = 0; [L16] unsigned int z = 0; [L17] unsigned int w = 0; [L19] COND TRUE x < 0x0fffffff [L20] y = 0 [L22] COND TRUE y < 0x0fffffff [L23] z =0 [L24] COND TRUE z <0x0fffffff [L25] z++ [L24] COND FALSE !(z <0x0fffffff) [L27] CALL __VERIFIER_assert(!(z % 4)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1373.7ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 15.8ms, AutomataDifference: 453.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 83 SDtfs, 80 SDslu, 30 SDs, 0 SdLazy, 72 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 195.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 281.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...