java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:17:24,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:17:24,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:17:24,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:17:24,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 02:17:24,895 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:17:24,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:17:24,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:17:24,896 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:17:24,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:17:24,897 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:17:24,897 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:17:24,897 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:17:24,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:17:24,898 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:17:24,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:17:24,898 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:17:24,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:17:24,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:17:24,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:17:24,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:17:24,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:17:24,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:17:24,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:17:24,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:17:24,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:17:24,900 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:17:24,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:17:24,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:17:24,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:17:24,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:17:24,901 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:17:24,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:17:24,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:17:24,902 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:17:24,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:17:24,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:17:24,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:17:24,946 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:17:24,946 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:17:24,947 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-10 02:17:25,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a4a7529/087785d51a87465aa483befa5ccdb65f/FLAG0e02e8976 [2019-09-10 02:17:25,464 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:17:25,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-09-10 02:17:25,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a4a7529/087785d51a87465aa483befa5ccdb65f/FLAG0e02e8976 [2019-09-10 02:17:25,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a4a7529/087785d51a87465aa483befa5ccdb65f [2019-09-10 02:17:25,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:17:25,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:17:25,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:17:25,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:17:25,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:17:25,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:17:25" (1/1) ... [2019-09-10 02:17:25,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ded780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:25, skipping insertion in model container [2019-09-10 02:17:25,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:17:25" (1/1) ... [2019-09-10 02:17:25,900 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:17:25,917 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:17:26,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:17:26,080 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:17:26,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:17:26,110 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:17:26,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26 WrapperNode [2019-09-10 02:17:26,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:17:26,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:17:26,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:17:26,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:17:26,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (1/1) ... [2019-09-10 02:17:26,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:17:26,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:17:26,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:17:26,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:17:26,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (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 [2019-09-10 02:17:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:17:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:17:26,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:17:26,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:17:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:17:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:17:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:17:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:17:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:17:26,525 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:17:26,525 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-10 02:17:26,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:17:26 BoogieIcfgContainer [2019-09-10 02:17:26,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:17:26,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:17:26,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:17:26,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:17:26,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:17:25" (1/3) ... [2019-09-10 02:17:26,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198ca444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:17:26, skipping insertion in model container [2019-09-10 02:17:26,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:17:26" (2/3) ... [2019-09-10 02:17:26,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198ca444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:17:26, skipping insertion in model container [2019-09-10 02:17:26,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:17:26" (3/3) ... [2019-09-10 02:17:26,557 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2019-09-10 02:17:26,577 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:17:26,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:17:26,611 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:17:26,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:17:26,638 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:17:26,638 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:17:26,640 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:17:26,640 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:17:26,641 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:17:26,641 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:17:26,641 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:17:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-10 02:17:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 02:17:26,664 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:26,665 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:26,667 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2019-09-10 02:17:26,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:26,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:26,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:26,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:26,713 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:26,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:17:26,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:17:26,804 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:17:26,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:17:26,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:17:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:17:26,820 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-10 02:17:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:26,834 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-10 02:17:26,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:17:26,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-10 02:17:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:26,846 INFO L225 Difference]: With dead ends: 26 [2019-09-10 02:17:26,846 INFO L226 Difference]: Without dead ends: 22 [2019-09-10 02:17:26,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:17:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-10 02:17:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-10 02:17:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-10 02:17:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-10 02:17:26,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-09-10 02:17:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:26,893 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-10 02:17:26,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:17:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-10 02:17:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 02:17:26,895 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:26,896 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:26,897 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2019-09-10 02:17:26,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:26,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:26,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:26,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:26,905 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:27,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:17:27,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 02:17:27,151 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:17:27,154 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 02:17:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 02:17:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 02:17:27,155 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-09-10 02:17:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:27,189 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-09-10 02:17:27,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 02:17:27,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-10 02:17:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:27,191 INFO L225 Difference]: With dead ends: 31 [2019-09-10 02:17:27,191 INFO L226 Difference]: Without dead ends: 31 [2019-09-10 02:17:27,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 02:17:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-10 02:17:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-09-10 02:17:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-10 02:17:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-10 02:17:27,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-09-10 02:17:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:27,199 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-10 02:17:27,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 02:17:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-10 02:17:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 02:17:27,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:27,200 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:27,200 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2019-09-10 02:17:27,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:27,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:27,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:27,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:27,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:27,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:17:27,291 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-10 02:17:27,293 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [20], [28], [36], [42], [44], [46], [69], [72], [74], [80], [81], [82], [84] [2019-09-10 02:17:27,328 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:17:27,328 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:17:27,403 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 02:17:27,689 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:17:27,703 INFO L272 AbstractInterpreter]: Visited 16 different actions 72 times. Merged at 3 different actions 24 times. Widened at 1 different actions 6 times. Performed 108 root evaluator evaluations with a maximum evaluation depth of 12. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-10 02:17:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:27,708 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:17:27,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:27,709 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:17:27,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:27,733 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:17:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:27,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 02:17:27,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:17:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:27,797 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:17:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:27,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:17:27,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-10 02:17:27,843 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:17:27,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:17:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:17:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:17:27,847 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-09-10 02:17:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:27,887 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-09-10 02:17:27,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 02:17:27,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-10 02:17:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:27,890 INFO L225 Difference]: With dead ends: 33 [2019-09-10 02:17:27,890 INFO L226 Difference]: Without dead ends: 33 [2019-09-10 02:17:27,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:17:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-10 02:17:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-09-10 02:17:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-10 02:17:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-09-10 02:17:27,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2019-09-10 02:17:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:27,895 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-09-10 02:17:27,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:17:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-09-10 02:17:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 02:17:27,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:27,896 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:27,896 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2019-09-10 02:17:27,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:27,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:27,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:27,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:27,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,020 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:17:28,020 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:17:28,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:17:28,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,021 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:17:28,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:17:28,042 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:17:28,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 02:17:28,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:17:28,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-10 02:17:28,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:17:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,106 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:17:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 02:17:28,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:17:28,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-09-10 02:17:28,192 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:17:28,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:17:28,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:17:28,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:17:28,194 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-09-10 02:17:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:28,271 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-09-10 02:17:28,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:17:28,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-10 02:17:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:28,274 INFO L225 Difference]: With dead ends: 35 [2019-09-10 02:17:28,274 INFO L226 Difference]: Without dead ends: 35 [2019-09-10 02:17:28,275 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:17:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-10 02:17:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-09-10 02:17:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-10 02:17:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-10 02:17:28,285 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-09-10 02:17:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:28,286 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-10 02:17:28,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:17:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-10 02:17:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-10 02:17:28,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:28,290 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:28,290 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2019-09-10 02:17:28,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:28,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:28,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:17:28,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:28,296 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:17:28,430 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:17:28,430 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:17:28,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:17:28,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 02:17:28,460 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 02:17:28,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 02:17:28,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:17:28,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 02:17:28,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:17:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,510 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:17:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:17:28,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-09-10 02:17:28,634 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:17:28,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:17:28,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:17:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:17:28,636 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-09-10 02:17:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:28,694 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-09-10 02:17:28,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:17:28,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-09-10 02:17:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:28,695 INFO L225 Difference]: With dead ends: 37 [2019-09-10 02:17:28,695 INFO L226 Difference]: Without dead ends: 37 [2019-09-10 02:17:28,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:17:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-10 02:17:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-09-10 02:17:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-10 02:17:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-10 02:17:28,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-09-10 02:17:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:28,701 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-10 02:17:28,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:17:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-10 02:17:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-10 02:17:28,702 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:28,702 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:28,702 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2019-09-10 02:17:28,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:28,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:28,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:17:28,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:28,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,807 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:17:28,807 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:17:28,807 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:17:28,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:28,808 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:17:28,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:28,831 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:17:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:28,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:17:28,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:17:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:28,879 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:17:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:29,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:17:29,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-10 02:17:29,004 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:17:29,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 02:17:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 02:17:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:17:29,006 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-09-10 02:17:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:29,091 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-09-10 02:17:29,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 02:17:29,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-09-10 02:17:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:29,092 INFO L225 Difference]: With dead ends: 39 [2019-09-10 02:17:29,092 INFO L226 Difference]: Without dead ends: 39 [2019-09-10 02:17:29,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:17:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-10 02:17:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-09-10 02:17:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-10 02:17:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-10 02:17:29,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2019-09-10 02:17:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:29,097 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-10 02:17:29,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 02:17:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-10 02:17:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-10 02:17:29,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:17:29,099 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:17:29,099 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:17:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:17:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2019-09-10 02:17:29,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:17:29,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:29,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:17:29,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:17:29,101 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:17:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:17:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:17:29,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:29,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:17:29,254 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:17:29,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:17:29,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:17:29,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:17:29,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:17:29,279 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:17:29,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 02:17:29,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:17:29,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 02:17:29,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:17:29,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:17:29,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:17:29,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:17:29,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:17:29,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:17:33,935 WARN L188 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-09-10 02:17:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-10 02:17:34,338 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:17:37,499 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 13 [2019-09-10 02:17:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-10 02:17:37,534 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 02:17:37,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 18 [2019-09-10 02:17:37,534 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:17:37,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:17:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:17:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-10 02:17:37,535 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-09-10 02:17:40,099 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 24 [2019-09-10 02:17:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:17:40,236 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-10 02:17:40,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 02:17:40,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-10 02:17:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:17:40,243 INFO L225 Difference]: With dead ends: 36 [2019-09-10 02:17:40,243 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:17:40,244 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2019-09-10 02:17:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:17:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:17:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:17:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:17:40,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-09-10 02:17:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:17:40,245 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:17:40,245 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:17:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:17:40,245 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:17:40,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:17:40 BoogieIcfgContainer [2019-09-10 02:17:40,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:17:40,254 INFO L168 Benchmark]: Toolchain (without parser) took 14368.08 ms. Allocated memory was 133.7 MB in the beginning and 255.9 MB in the end (delta: 122.2 MB). Free memory was 90.6 MB in the beginning and 168.9 MB in the end (delta: -78.3 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,256 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 133.7 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.36 ms. Allocated memory is still 133.7 MB. Free memory was 90.4 MB in the beginning and 80.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,259 INFO L168 Benchmark]: Boogie Preprocessor took 112.38 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 80.6 MB in the beginning and 176.8 MB in the end (delta: -96.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,260 INFO L168 Benchmark]: RCFGBuilder took 316.89 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 163.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,262 INFO L168 Benchmark]: TraceAbstraction took 13708.65 ms. Allocated memory was 200.3 MB in the beginning and 255.9 MB in the end (delta: 55.6 MB). Free memory was 163.3 MB in the beginning and 168.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:17:40,268 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 133.7 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.36 ms. Allocated memory is still 133.7 MB. Free memory was 90.4 MB in the beginning and 80.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.38 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 80.6 MB in the beginning and 176.8 MB in the end (delta: -96.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.89 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 163.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13708.65 ms. Allocated memory was 200.3 MB in the beginning and 255.9 MB in the end (delta: 55.6 MB). Free memory was 163.3 MB in the beginning and 168.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 13.6s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 87 SDslu, 486 SDs, 0 SdLazy, 202 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 228 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 311 ConstructedInterpolants, 2 QuantifiedInterpolants, 18538 SizeOfPredicates, 7 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...