/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:49,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:49,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:49,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:49,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:49,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:49,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:49,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:49,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:49,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:49,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:49,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:49,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:49,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:49,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:49,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:49,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:49,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:49,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:49,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:49,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:49,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:49,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:49,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:49,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:49,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:49,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:49,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:49,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:43:49,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:49,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:49,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:49,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:49,540 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:49,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:49,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:49,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:49,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:49,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:49,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:49,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:49,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:49,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:49,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:49,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:49,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:49,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:49,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:49,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:49,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:49,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:49,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:49,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:49,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:49,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:49,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:49,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:49,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:49,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:50,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:50,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:50,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:50,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:50,048 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:50,049 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-09-04 13:43:50,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4c792ed/895d7553ebc34431b66c993780f6d71c/FLAGb7874cd0a [2020-09-04 13:43:50,735 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:50,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-09-04 13:43:50,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4c792ed/895d7553ebc34431b66c993780f6d71c/FLAGb7874cd0a [2020-09-04 13:43:51,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4c792ed/895d7553ebc34431b66c993780f6d71c [2020-09-04 13:43:51,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:51,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:51,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:51,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:51,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:51,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6c306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51, skipping insertion in model container [2020-09-04 13:43:51,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:51,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:51,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:51,377 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:51,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:51,421 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:51,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51 WrapperNode [2020-09-04 13:43:51,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:51,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:51,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:51,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:51,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... [2020-09-04 13:43:51,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:51,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:51,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:51,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:51,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:43:51,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:43:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:43:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:43:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:43:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:51,959 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:51,959 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 13:43:51,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:51 BoogieIcfgContainer [2020-09-04 13:43:51,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:51,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:51,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:51,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:51,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:51" (1/3) ... [2020-09-04 13:43:51,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3345ca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:51, skipping insertion in model container [2020-09-04 13:43:51,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:51" (2/3) ... [2020-09-04 13:43:51,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3345ca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:51, skipping insertion in model container [2020-09-04 13:43:51,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:51" (3/3) ... [2020-09-04 13:43:51,975 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-09-04 13:43:51,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:51,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:43:52,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:43:52,072 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:52,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:52,073 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:52,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:52,073 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:52,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:52,076 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:52,076 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-09-04 13:43:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:52,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:52,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:52,108 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1128800291, now seen corresponding path program 1 times [2020-09-04 13:43:52,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:52,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778532132] [2020-09-04 13:43:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:52,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778532132] [2020-09-04 13:43:52,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:52,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:52,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460668282] [2020-09-04 13:43:52,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:52,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:52,443 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-09-04 13:43:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:52,661 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2020-09-04 13:43:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:52,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:43:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:52,689 INFO L225 Difference]: With dead ends: 87 [2020-09-04 13:43:52,690 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:43:52,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:43:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-04 13:43:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:43:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-09-04 13:43:52,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2020-09-04 13:43:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:52,758 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-09-04 13:43:52,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-09-04 13:43:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:52,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:52,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:52,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:43:52,762 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1106844324, now seen corresponding path program 1 times [2020-09-04 13:43:52,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:52,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369455233] [2020-09-04 13:43:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:52,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369455233] [2020-09-04 13:43:52,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:52,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:52,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180172326] [2020-09-04 13:43:52,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:52,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:52,838 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-09-04 13:43:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:52,954 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-09-04 13:43:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:52,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:43:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:52,959 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:43:52,959 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:43:52,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:52,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:43:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-04 13:43:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 13:43:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-09-04 13:43:52,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 13 [2020-09-04 13:43:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:52,975 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-09-04 13:43:52,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-09-04 13:43:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:43:52,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:52,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:52,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:43:52,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1247762898, now seen corresponding path program 1 times [2020-09-04 13:43:52,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:52,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228153114] [2020-09-04 13:43:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:53,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228153114] [2020-09-04 13:43:53,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:53,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:53,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402233951] [2020-09-04 13:43:53,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:53,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:53,060 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 5 states. [2020-09-04 13:43:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,171 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-09-04 13:43:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:53,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-04 13:43:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,173 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:43:53,174 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:43:53,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:43:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:43:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:43:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-09-04 13:43:53,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 18 [2020-09-04 13:43:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,190 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-09-04 13:43:53,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-09-04 13:43:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 13:43:53,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:53,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:43:53,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2050697988, now seen corresponding path program 1 times [2020-09-04 13:43:53,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672928889] [2020-09-04 13:43:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:43:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:43:53,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672928889] [2020-09-04 13:43:53,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:53,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:43:53,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412275384] [2020-09-04 13:43:53,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:43:53,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:43:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:53,350 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 6 states. [2020-09-04 13:43:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,497 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-09-04 13:43:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:43:53,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-04 13:43:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,500 INFO L225 Difference]: With dead ends: 60 [2020-09-04 13:43:53,500 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:43:53,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:43:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-04 13:43:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-04 13:43:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-09-04 13:43:53,513 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 23 [2020-09-04 13:43:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,514 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-09-04 13:43:53,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:43:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-09-04 13:43:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:43:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,516 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:53,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:43:53,516 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -35497745, now seen corresponding path program 1 times [2020-09-04 13:43:53,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548938518] [2020-09-04 13:43:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:43:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:43:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 13:43:53,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548938518] [2020-09-04 13:43:53,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:53,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:53,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488272932] [2020-09-04 13:43:53,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:53,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:53,610 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-09-04 13:43:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,704 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-09-04 13:43:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:53,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-04 13:43:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,706 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:43:53,706 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:43:53,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:43:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-04 13:43:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 13:43:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-09-04 13:43:53,719 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-09-04 13:43:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,720 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-09-04 13:43:53,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-09-04 13:43:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 13:43:53,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,722 INFO L422 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] [2020-09-04 13:43:53,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 13:43:53,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash 663071772, now seen corresponding path program 1 times [2020-09-04 13:43:53,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108719617] [2020-09-04 13:43:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:43:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:43:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-04 13:43:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:43:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:43:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-04 13:43:53,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108719617] [2020-09-04 13:43:53,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:53,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:43:53,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870331457] [2020-09-04 13:43:53,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:43:53,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:43:53,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:53,844 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 6 states. [2020-09-04 13:43:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,991 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-09-04 13:43:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:43:53,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-04 13:43:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,993 INFO L225 Difference]: With dead ends: 74 [2020-09-04 13:43:53,993 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 13:43:53,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:43:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 13:43:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-09-04 13:43:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:43:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-09-04 13:43:54,006 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 46 [2020-09-04 13:43:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:54,007 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-09-04 13:43:54,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:43:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-09-04 13:43:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 13:43:54,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:54,010 INFO L422 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] [2020-09-04 13:43:54,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 13:43:54,010 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash -801825860, now seen corresponding path program 1 times [2020-09-04 13:43:54,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:54,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660628568] [2020-09-04 13:43:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:43:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:43:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-04 13:43:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:43:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:43:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:43:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:43:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-04 13:43:54,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660628568] [2020-09-04 13:43:54,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:54,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:43:54,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345660673] [2020-09-04 13:43:54,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:43:54,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:43:54,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:43:54,255 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 7 states. [2020-09-04 13:43:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:54,492 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-09-04 13:43:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:43:54,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-09-04 13:43:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:54,495 INFO L225 Difference]: With dead ends: 74 [2020-09-04 13:43:54,496 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 13:43:54,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:43:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 13:43:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-09-04 13:43:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 13:43:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-09-04 13:43:54,530 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 56 [2020-09-04 13:43:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:54,531 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-09-04 13:43:54,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:43:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-09-04 13:43:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:43:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:54,540 INFO L422 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] [2020-09-04 13:43:54,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 13:43:54,540 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1730547273, now seen corresponding path program 1 times [2020-09-04 13:43:54,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:54,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684462225] [2020-09-04 13:43:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:43:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:43:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-04 13:43:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:43:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:43:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:43:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:43:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-04 13:43:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 13:43:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-09-04 13:43:54,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684462225] [2020-09-04 13:43:54,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:54,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 13:43:54,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607250799] [2020-09-04 13:43:54,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:43:54,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:43:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:54,707 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 8 states. [2020-09-04 13:43:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:54,896 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-09-04 13:43:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:43:54,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-09-04 13:43:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:54,898 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:43:54,898 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:43:54,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:43:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:43:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:43:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:43:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:43:54,901 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2020-09-04 13:43:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:54,901 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:43:54,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:43:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:43:54,902 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:43:54,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 13:43:54,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:43:55,334 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:43:55,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:43:55,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:43:55,335 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:43:55,335 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:43:55,335 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:43:55,335 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:43:55,336 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 13:43:55,336 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:43:55,336 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:43:55,338 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,338 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-04 13:43:55,339 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-09-04 13:43:55,339 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 54) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,339 INFO L268 CegarLoopResult]: For program point L23-3(lines 23 54) no Hoare annotation was computed. [2020-09-04 13:43:55,339 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,341 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,341 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-04 13:43:55,341 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-04 13:43:55,341 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 53) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,341 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-04 13:43:55,341 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-09-04 13:43:55,342 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,342 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,342 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,342 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,342 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,343 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,343 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-09-04 13:43:55,343 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,343 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-09-04 13:43:55,345 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-04 13:43:55,345 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-04 13:43:55,346 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,346 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-09-04 13:43:55,346 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,346 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,347 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,347 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,348 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-04 13:43:55,348 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 13:43:55,348 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:43:55,349 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-04 13:43:55,349 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-04 13:43:55,349 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:43:55,349 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-04 13:43:55,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:55 BoogieIcfgContainer [2020-09-04 13:43:55,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:55,392 INFO L168 Benchmark]: Toolchain (without parser) took 4291.73 ms. Allocated memory was 137.9 MB in the beginning and 250.1 MB in the end (delta: 112.2 MB). Free memory was 101.0 MB in the beginning and 126.3 MB in the end (delta: -25.3 MB). Peak memory consumption was 86.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,393 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.20 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 90.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,395 INFO L168 Benchmark]: Boogie Preprocessor took 132.54 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,396 INFO L168 Benchmark]: RCFGBuilder took 409.57 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 162.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,400 INFO L168 Benchmark]: TraceAbstraction took 3413.40 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 161.6 MB in the beginning and 126.3 MB in the end (delta: 35.2 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:55,411 INFO L336 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 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.20 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 90.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.54 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.57 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 162.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3413.40 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 161.6 MB in the beginning and 126.3 MB in the end (delta: 35.2 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i + 1 <= len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 104 SDslu, 1002 SDs, 0 SdLazy, 517 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s 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 DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 368 HoareAnnotationTreeSize, 55 FomulaSimplifications, 534 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 23 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 256 ConstructedInterpolants, 0 QuantifiedInterpolants, 23622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...