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-fea9116 [2019-09-20 13:25:30,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:30,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:30,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:30,091 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 [2019-09-20 13:25:30,106 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:30,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:30,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:30,107 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:30,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:30,108 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:30,108 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:30,108 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:30,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:30,108 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:30,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:30,109 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:30,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:30,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:30,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:30,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:30,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:30,111 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:30,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:30,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:30,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:30,111 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:30,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:30,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:30,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:30,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:30,112 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:30,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:30,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:30,113 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:30,154 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:30,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:30,170 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:30,172 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:30,172 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:30,173 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2019-09-20 13:25:30,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a48b1df9/f7222dc61c254ed8a39d749b801a74f3/FLAGa709b9aa4 [2019-09-20 13:25:30,734 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:30,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2019-09-20 13:25:30,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a48b1df9/f7222dc61c254ed8a39d749b801a74f3/FLAGa709b9aa4 [2019-09-20 13:25:31,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a48b1df9/f7222dc61c254ed8a39d749b801a74f3 [2019-09-20 13:25:31,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:31,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:31,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:31,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:31,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:31,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221181d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31, skipping insertion in model container [2019-09-20 13:25:31,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,162 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:31,184 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:31,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:31,345 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:31,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:31,376 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:31,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31 WrapperNode [2019-09-20 13:25:31,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:31,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:31,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:31,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:31,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:31,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:31,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:31,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:31,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (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 [2019-09-20 13:25:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:31,810 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:31,811 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:25:31,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:31 BoogieIcfgContainer [2019-09-20 13:25:31,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:31,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:31,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:31,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:31,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:31" (1/3) ... [2019-09-20 13:25:31,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e05ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:31, skipping insertion in model container [2019-09-20 13:25:31,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31" (2/3) ... [2019-09-20 13:25:31,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e05ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:31, skipping insertion in model container [2019-09-20 13:25:31,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:31" (3/3) ... [2019-09-20 13:25:31,821 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2019-09-20 13:25:31,832 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:31,843 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:31,875 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:31,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:31,910 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:31,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:31,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:31,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:31,911 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:31,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:31,911 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-09-20 13:25:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:25:31,938 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:31,939 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:31,941 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1778619980, now seen corresponding path program 1 times [2019-09-20 13:25:31,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:32,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:32,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:32,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:32,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:32,154 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:32,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:32,185 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2019-09-20 13:25:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:32,423 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2019-09-20 13:25:32,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:32,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-20 13:25:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:32,445 INFO L225 Difference]: With dead ends: 48 [2019-09-20 13:25:32,445 INFO L226 Difference]: Without dead ends: 43 [2019-09-20 13:25:32,449 INFO L636 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 [2019-09-20 13:25:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-20 13:25:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-20 13:25:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 13:25:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2019-09-20 13:25:32,531 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 13 [2019-09-20 13:25:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:32,532 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2019-09-20 13:25:32,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2019-09-20 13:25:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:25:32,535 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:32,535 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:32,535 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1756664013, now seen corresponding path program 1 times [2019-09-20 13:25:32,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:32,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:32,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:32,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:32,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:32,633 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:32,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:32,636 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand 5 states. [2019-09-20 13:25:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:32,748 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-09-20 13:25:32,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:32,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-20 13:25:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:32,751 INFO L225 Difference]: With dead ends: 54 [2019-09-20 13:25:32,751 INFO L226 Difference]: Without dead ends: 54 [2019-09-20 13:25:32,752 INFO L636 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 [2019-09-20 13:25:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-20 13:25:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-09-20 13:25:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-20 13:25:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2019-09-20 13:25:32,765 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2019-09-20 13:25:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:32,765 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2019-09-20 13:25:32,765 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2019-09-20 13:25:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:25:32,766 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:32,766 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:32,767 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash -276218857, now seen corresponding path program 1 times [2019-09-20 13:25:32,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:32,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:32,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,770 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:32,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:32,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:32,848 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:32,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:32,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:32,850 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2019-09-20 13:25:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:32,983 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-09-20 13:25:32,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:32,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-09-20 13:25:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:32,991 INFO L225 Difference]: With dead ends: 54 [2019-09-20 13:25:32,991 INFO L226 Difference]: Without dead ends: 54 [2019-09-20 13:25:32,992 INFO L636 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 [2019-09-20 13:25:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-20 13:25:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-20 13:25:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-20 13:25:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-09-20 13:25:33,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2019-09-20 13:25:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,016 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-09-20 13:25:33,016 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-09-20 13:25:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-20 13:25:33,018 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,018 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:33,019 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash -12086036, now seen corresponding path program 1 times [2019-09-20 13:25:33,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:25:33,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:33,098 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:33,100 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2019-09-20 13:25:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,273 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-09-20 13:25:33,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:33,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-09-20 13:25:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,275 INFO L225 Difference]: With dead ends: 58 [2019-09-20 13:25:33,275 INFO L226 Difference]: Without dead ends: 58 [2019-09-20 13:25:33,276 INFO L636 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 [2019-09-20 13:25:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-20 13:25:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-20 13:25:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-20 13:25:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2019-09-20 13:25:33,284 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2019-09-20 13:25:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,285 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2019-09-20 13:25:33,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2019-09-20 13:25:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 13:25:33,286 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,286 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:33,287 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1403678473, now seen corresponding path program 1 times [2019-09-20 13:25:33,287 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:25:33,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:33,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:33,353 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2019-09-20 13:25:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,444 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2019-09-20 13:25:33,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:33,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-20 13:25:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,446 INFO L225 Difference]: With dead ends: 63 [2019-09-20 13:25:33,446 INFO L226 Difference]: Without dead ends: 63 [2019-09-20 13:25:33,447 INFO L636 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 [2019-09-20 13:25:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-20 13:25:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-09-20 13:25:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-20 13:25:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2019-09-20 13:25:33,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2019-09-20 13:25:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,456 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2019-09-20 13:25:33,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2019-09-20 13:25:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 13:25:33,458 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,458 INFO L407 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] [2019-09-20 13:25:33,458 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,459 INFO L82 PathProgramCache]: Analyzing trace with hash -869865180, now seen corresponding path program 1 times [2019-09-20 13:25:33,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,461 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-20 13:25:33,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:33,524 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:33,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:33,526 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2019-09-20 13:25:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,651 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2019-09-20 13:25:33,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:33,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-20 13:25:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,653 INFO L225 Difference]: With dead ends: 72 [2019-09-20 13:25:33,654 INFO L226 Difference]: Without dead ends: 72 [2019-09-20 13:25:33,654 INFO L636 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 [2019-09-20 13:25:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-20 13:25:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-20 13:25:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-20 13:25:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2019-09-20 13:25:33,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2019-09-20 13:25:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,662 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2019-09-20 13:25:33,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2019-09-20 13:25:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-20 13:25:33,664 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,665 INFO L407 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] [2019-09-20 13:25:33,665 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -863098428, now seen corresponding path program 1 times [2019-09-20 13:25:33,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,668 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-20 13:25:33,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:25:33,777 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:25:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:25:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:33,780 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2019-09-20 13:25:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,952 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2019-09-20 13:25:33,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:33,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-09-20 13:25:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,954 INFO L225 Difference]: With dead ends: 72 [2019-09-20 13:25:33,955 INFO L226 Difference]: Without dead ends: 72 [2019-09-20 13:25:33,955 INFO L636 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 [2019-09-20 13:25:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-20 13:25:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-09-20 13:25:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-20 13:25:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2019-09-20 13:25:33,972 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2019-09-20 13:25:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,972 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2019-09-20 13:25:33,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:25:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2019-09-20 13:25:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-20 13:25:33,978 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,978 INFO L407 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] [2019-09-20 13:25:33,979 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1349635161, now seen corresponding path program 1 times [2019-09-20 13:25:33,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,983 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-09-20 13:25:34,116 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:34,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:25:34,116 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:34,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:25:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:25:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:25:34,117 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2019-09-20 13:25:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:34,310 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-09-20 13:25:34,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:25:34,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2019-09-20 13:25:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:34,311 INFO L225 Difference]: With dead ends: 70 [2019-09-20 13:25:34,311 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:34,312 INFO L636 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 [2019-09-20 13:25:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:34,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2019-09-20 13:25:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:34,320 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:34,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:25:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:34,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:34,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:34 BoogieIcfgContainer [2019-09-20 13:25:34,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:34,330 INFO L168 Benchmark]: Toolchain (without parser) took 3181.74 ms. Allocated memory was 137.9 MB in the beginning and 269.5 MB in the end (delta: 131.6 MB). Free memory was 85.4 MB in the beginning and 241.7 MB in the end (delta: -156.3 MB). Peak memory consumption was 101.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,332 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.06 ms. Allocated memory is still 137.9 MB. Free memory was 85.1 MB in the beginning and 75.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,336 INFO L168 Benchmark]: Boogie Preprocessor took 133.37 ms. Allocated memory was 137.9 MB in the beginning and 198.2 MB in the end (delta: 60.3 MB). Free memory was 75.1 MB in the beginning and 175.4 MB in the end (delta: -100.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,337 INFO L168 Benchmark]: RCFGBuilder took 301.10 ms. Allocated memory is still 198.2 MB. Free memory was 175.4 MB in the beginning and 159.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,345 INFO L168 Benchmark]: TraceAbstraction took 2513.13 ms. Allocated memory was 198.2 MB in the beginning and 269.5 MB in the end (delta: 71.3 MB). Free memory was 159.3 MB in the beginning and 241.7 MB in the end (delta: -82.3 MB). Peak memory consumption was 115.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:34,351 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.06 ms. Allocated memory is still 137.9 MB. Free memory was 85.1 MB in the beginning and 75.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.37 ms. Allocated memory was 137.9 MB in the beginning and 198.2 MB in the end (delta: 60.3 MB). Free memory was 75.1 MB in the beginning and 175.4 MB in the end (delta: -100.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.10 ms. Allocated memory is still 198.2 MB. Free memory was 175.4 MB in the beginning and 159.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2513.13 ms. Allocated memory was 198.2 MB in the beginning and 269.5 MB in the end (delta: 71.3 MB). Free memory was 159.3 MB in the beginning and 241.7 MB in the end (delta: -82.3 MB). Peak memory consumption was 115.6 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, 42 locations, 1 error locations. SAFE Result, 2.4s 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, 0.7s 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...