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/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:32:34,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:32:34,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:32:34,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:32:34,170 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 [2019-10-03 02:32:34,185 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:32:34,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:32:34,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:32:34,185 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:32:34,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:32:34,186 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:32:34,186 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:32:34,187 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:32:34,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:32:34,187 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:32:34,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:32:34,188 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:32:34,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:32:34,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:32:34,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:32:34,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:32:34,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:32:34,189 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:32:34,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:32:34,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:32:34,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:32:34,190 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:32:34,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:32:34,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:32:34,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:32:34,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:32:34,191 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:32:34,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:32:34,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:32:34,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:32:34,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:32:34,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:32:34,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:32:34,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:32:34,248 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:32:34,249 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2019-10-03 02:32:34,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba829597/379797d2d876445cbd6b80bed8264140/FLAG193c687e3 [2019-10-03 02:32:34,715 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:32:34,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2019-10-03 02:32:34,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba829597/379797d2d876445cbd6b80bed8264140/FLAG193c687e3 [2019-10-03 02:32:35,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba829597/379797d2d876445cbd6b80bed8264140 [2019-10-03 02:32:35,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:32:35,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:32:35,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:32:35,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:32:35,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:32:35,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47cf3380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35, skipping insertion in model container [2019-10-03 02:32:35,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,164 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:32:35,181 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:32:35,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:32:35,350 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:32:35,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:32:35,384 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:32:35,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35 WrapperNode [2019-10-03 02:32:35,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:32:35,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:32:35,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:32:35,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:32:35,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (1/1) ... [2019-10-03 02:32:35,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:32:35,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:32:35,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:32:35,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:32:35,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (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 [2019-10-03 02:32:35,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:32:35,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:32:35,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:32:35,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:32:35,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:32:35,816 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:32:35,817 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-03 02:32:35,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:32:35 BoogieIcfgContainer [2019-10-03 02:32:35,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:32:35,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:32:35,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:32:35,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:32:35,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:32:35" (1/3) ... [2019-10-03 02:32:35,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351e51cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:32:35, skipping insertion in model container [2019-10-03 02:32:35,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:35" (2/3) ... [2019-10-03 02:32:35,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351e51cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:32:35, skipping insertion in model container [2019-10-03 02:32:35,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:32:35" (3/3) ... [2019-10-03 02:32:35,843 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2019-10-03 02:32:35,858 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:32:35,867 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:32:35,885 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:32:35,913 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:32:35,913 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:32:35,913 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:32:35,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:32:35,914 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:32:35,914 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:32:35,914 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:32:35,914 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:32:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-03 02:32:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:32:35,941 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:35,942 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:35,945 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1778619980, now seen corresponding path program 1 times [2019-10-03 02:32:35,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:35,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:35,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:32:36,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:36,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:32:36,142 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:36,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:32:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:32:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:32:36,159 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2019-10-03 02:32:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:36,366 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2019-10-03 02:32:36,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:32:36,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-03 02:32:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:36,385 INFO L225 Difference]: With dead ends: 48 [2019-10-03 02:32:36,385 INFO L226 Difference]: Without dead ends: 43 [2019-10-03 02:32:36,390 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-03 02:32:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-10-03 02:32:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-03 02:32:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2019-10-03 02:32:36,438 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 13 [2019-10-03 02:32:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:36,439 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2019-10-03 02:32:36,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:32:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2019-10-03 02:32:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:32:36,441 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:36,441 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:36,443 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:36,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1756664013, now seen corresponding path program 1 times [2019-10-03 02:32:36,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:36,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:36,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:32:36,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:36,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:32:36,537 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:36,539 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:32:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:32:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:32:36,540 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand 5 states. [2019-10-03 02:32:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:36,677 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-10-03 02:32:36,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:32:36,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-03 02:32:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:36,680 INFO L225 Difference]: With dead ends: 54 [2019-10-03 02:32:36,680 INFO L226 Difference]: Without dead ends: 54 [2019-10-03 02:32:36,681 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-03 02:32:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-03 02:32:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-03 02:32:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2019-10-03 02:32:36,700 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2019-10-03 02:32:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:36,700 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2019-10-03 02:32:36,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:32:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2019-10-03 02:32:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-03 02:32:36,702 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:36,702 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:36,702 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:36,703 INFO L82 PathProgramCache]: Analyzing trace with hash -276218857, now seen corresponding path program 1 times [2019-10-03 02:32:36,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:36,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:36,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:32:36,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:36,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:32:36,762 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:36,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:32:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:32:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:32:36,764 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2019-10-03 02:32:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:36,889 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-10-03 02:32:36,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:32:36,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-03 02:32:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:36,896 INFO L225 Difference]: With dead ends: 54 [2019-10-03 02:32:36,896 INFO L226 Difference]: Without dead ends: 54 [2019-10-03 02:32:36,897 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-03 02:32:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-03 02:32:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-03 02:32:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-03 02:32:36,918 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2019-10-03 02:32:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:36,919 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-03 02:32:36,919 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:32:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-03 02:32:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-03 02:32:36,920 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:36,921 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:36,922 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -12086036, now seen corresponding path program 1 times [2019-10-03 02:32:36,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:36,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:36,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-03 02:32:37,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:37,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-03 02:32:37,007 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:37,008 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:32:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:32:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:37,008 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2019-10-03 02:32:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:37,177 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-10-03 02:32:37,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:32:37,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-03 02:32:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:37,179 INFO L225 Difference]: With dead ends: 58 [2019-10-03 02:32:37,180 INFO L226 Difference]: Without dead ends: 58 [2019-10-03 02:32:37,180 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:32:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-03 02:32:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-03 02:32:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-03 02:32:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2019-10-03 02:32:37,189 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2019-10-03 02:32:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:37,189 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2019-10-03 02:32:37,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:32:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2019-10-03 02:32:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-03 02:32:37,191 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:37,191 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:37,191 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:37,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1403678473, now seen corresponding path program 1 times [2019-10-03 02:32:37,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:37,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-03 02:32:37,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:37,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:32:37,246 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:37,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:32:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:32:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:32:37,247 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2019-10-03 02:32:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:37,345 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2019-10-03 02:32:37,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:32:37,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-03 02:32:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:37,347 INFO L225 Difference]: With dead ends: 63 [2019-10-03 02:32:37,347 INFO L226 Difference]: Without dead ends: 63 [2019-10-03 02:32:37,348 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-03 02:32:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-03 02:32:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-03 02:32:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2019-10-03 02:32:37,356 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2019-10-03 02:32:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:37,356 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2019-10-03 02:32:37,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:32:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2019-10-03 02:32:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-03 02:32:37,358 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:37,359 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:37,359 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash -869865180, now seen corresponding path program 1 times [2019-10-03 02:32:37,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:37,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:37,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,361 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-03 02:32:37,436 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:37,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-03 02:32:37,437 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:37,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:32:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:32:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:37,439 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2019-10-03 02:32:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:37,582 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2019-10-03 02:32:37,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:32:37,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-03 02:32:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:37,584 INFO L225 Difference]: With dead ends: 72 [2019-10-03 02:32:37,584 INFO L226 Difference]: Without dead ends: 72 [2019-10-03 02:32:37,585 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:32:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-03 02:32:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-10-03 02:32:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-03 02:32:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2019-10-03 02:32:37,593 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2019-10-03 02:32:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:37,594 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2019-10-03 02:32:37,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:32:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2019-10-03 02:32:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-03 02:32:37,596 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:37,597 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:37,597 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -863098428, now seen corresponding path program 1 times [2019-10-03 02:32:37,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,603 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-03 02:32:37,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:37,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-03 02:32:37,746 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:37,747 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-03 02:32:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-03 02:32:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:32:37,754 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2019-10-03 02:32:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:37,934 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2019-10-03 02:32:37,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-03 02:32:37,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-10-03 02:32:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:37,936 INFO L225 Difference]: With dead ends: 72 [2019-10-03 02:32:37,936 INFO L226 Difference]: Without dead ends: 72 [2019-10-03 02:32:37,937 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:32:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-03 02:32:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-03 02:32:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-03 02:32:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2019-10-03 02:32:37,945 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2019-10-03 02:32:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:37,945 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2019-10-03 02:32:37,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-03 02:32:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2019-10-03 02:32:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-03 02:32:37,947 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:37,947 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:37,948 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:37,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1349635161, now seen corresponding path program 1 times [2019-10-03 02:32:37,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:37,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:37,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:37,950 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-03 02:32:38,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:38,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-03 02:32:38,047 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:38,047 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-03 02:32:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-03 02:32:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:32:38,048 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2019-10-03 02:32:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:38,249 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-03 02:32:38,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-03 02:32:38,250 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2019-10-03 02:32:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:38,251 INFO L225 Difference]: With dead ends: 70 [2019-10-03 02:32:38,251 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:32:38,251 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-03 02:32:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:32:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:32:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:32:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:32:38,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2019-10-03 02:32:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:38,253 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:32:38,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-03 02:32:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:32:38,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:32:38,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:32:38 BoogieIcfgContainer [2019-10-03 02:32:38,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:32:38,261 INFO L168 Benchmark]: Toolchain (without parser) took 3111.42 ms. Allocated memory was 141.6 MB in the beginning and 255.3 MB in the end (delta: 113.8 MB). Free memory was 89.0 MB in the beginning and 221.8 MB in the end (delta: -132.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-03 02:32:38,262 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 107.7 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:32:38,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.08 ms. Allocated memory is still 141.6 MB. Free memory was 88.8 MB in the beginning and 78.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:38,264 INFO L168 Benchmark]: Boogie Preprocessor took 115.07 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 78.8 MB in the beginning and 178.7 MB in the end (delta: -99.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:38,265 INFO L168 Benchmark]: RCFGBuilder took 330.32 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 163.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:38,265 INFO L168 Benchmark]: TraceAbstraction took 2425.96 ms. Allocated memory was 201.3 MB in the beginning and 255.3 MB in the end (delta: 54.0 MB). Free memory was 162.8 MB in the beginning and 221.8 MB in the end (delta: -59.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-03 02:32:38,269 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 107.7 MB in the beginning and 107.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.08 ms. Allocated memory is still 141.6 MB. Free memory was 88.8 MB in the beginning and 78.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.07 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 78.8 MB in the beginning and 178.7 MB in the end (delta: -99.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.32 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 163.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2425.96 ms. Allocated memory was 201.3 MB in the beginning and 255.3 MB in the end (delta: 54.0 MB). Free memory was 162.8 MB in the beginning and 221.8 MB in the end (delta: -59.0 MB). There was no memory consumed. 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, 42 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 8 OverallIterations, 11 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 395 SDtfs, 102 SDslu, 1026 SDs, 0 SdLazy, 528 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23798 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...