/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:04:47,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:04:47,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:04:47,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:04:47,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:04:47,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:04:47,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:04:47,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:04:47,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:04:47,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:04:47,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:04:47,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:04:47,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:04:47,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:04:47,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:04:47,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:04:47,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:04:47,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:04:47,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:04:47,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:04:47,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:04:47,988 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:04:47,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:04:47,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:04:47,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:04:47,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:04:47,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:04:47,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:04:47,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:04:47,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:04:47,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:04:47,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:04:47,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:04:47,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:04:47,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:04:47,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:04:47,994 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:04:47,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:04:47,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:04:47,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:04:47,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:04:47,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:04:47,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:04:47,995 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:04:48,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:04:48,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:04:48,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:04:48,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:04:48,296 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:04:48,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-08-22 23:04:48,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d5eaa55/ea82cbd0f469482a93bd274a7cd782dc/FLAGcc0bb33c8 [2020-08-22 23:04:48,840 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:04:48,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-08-22 23:04:48,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d5eaa55/ea82cbd0f469482a93bd274a7cd782dc/FLAGcc0bb33c8 [2020-08-22 23:04:49,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d5eaa55/ea82cbd0f469482a93bd274a7cd782dc [2020-08-22 23:04:49,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:04:49,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:04:49,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:04:49,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:04:49,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:04:49,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565983c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49, skipping insertion in model container [2020-08-22 23:04:49,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:04:49,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:04:49,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:04:49,457 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:04:49,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:04:49,482 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:04:49,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49 WrapperNode [2020-08-22 23:04:49,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:04:49,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:04:49,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:04:49,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:04:49,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (1/1) ... [2020-08-22 23:04:49,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:04:49,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:04:49,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:04:49,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:04:49,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (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 [2020-08-22 23:04:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:04:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:04:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:04:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:04:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:04:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:04:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:04:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:04:49,856 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:04:49,857 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 23:04:49,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:04:49 BoogieIcfgContainer [2020-08-22 23:04:49,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:04:49,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:04:49,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:04:49,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:04:49,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:04:49" (1/3) ... [2020-08-22 23:04:49,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751f7fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:04:49, skipping insertion in model container [2020-08-22 23:04:49,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:49" (2/3) ... [2020-08-22 23:04:49,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751f7fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:04:49, skipping insertion in model container [2020-08-22 23:04:49,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:04:49" (3/3) ... [2020-08-22 23:04:49,888 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-08-22 23:04:49,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:04:49,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:04:49,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:04:50,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:04:50,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:04:50,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:04:50,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:04:50,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:04:50,024 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:04:50,024 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:04:50,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:04:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 23:04:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 23:04:50,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:50,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:50,063 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2141903635, now seen corresponding path program 1 times [2020-08-22 23:04:50,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:50,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340377136] [2020-08-22 23:04:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:50,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340377136] [2020-08-22 23:04:50,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:50,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:04:50,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713544517] [2020-08-22 23:04:50,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:04:50,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:04:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:04:50,353 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-08-22 23:04:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:50,446 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-08-22 23:04:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:04:50,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 23:04:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:50,458 INFO L225 Difference]: With dead ends: 60 [2020-08-22 23:04:50,458 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 23:04:50,462 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 [2020-08-22 23:04:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 23:04:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 23:04:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 23:04:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 23:04:50,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 19 [2020-08-22 23:04:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:50,510 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 23:04:50,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:04:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 23:04:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:04:50,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:50,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:50,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:04:50,513 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1520201371, now seen corresponding path program 1 times [2020-08-22 23:04:50,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:50,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262755798] [2020-08-22 23:04:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262755798] [2020-08-22 23:04:50,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:50,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:04:50,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983192660] [2020-08-22 23:04:50,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:04:50,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:04:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:04:50,613 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2020-08-22 23:04:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:50,679 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-08-22 23:04:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:04:50,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 23:04:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:50,682 INFO L225 Difference]: With dead ends: 49 [2020-08-22 23:04:50,683 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 23:04:50,684 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 [2020-08-22 23:04:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 23:04:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-08-22 23:04:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 23:04:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-22 23:04:50,704 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 24 [2020-08-22 23:04:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:50,705 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-22 23:04:50,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:04:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-22 23:04:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 23:04:50,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:50,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:50,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:04:50,709 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1589830701, now seen corresponding path program 1 times [2020-08-22 23:04:50,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:50,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236153246] [2020-08-22 23:04:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 23:04:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:50,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236153246] [2020-08-22 23:04:50,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:50,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:04:50,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283327362] [2020-08-22 23:04:50,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:04:50,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:04:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:04:50,765 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 3 states. [2020-08-22 23:04:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:50,805 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-08-22 23:04:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:04:50,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 23:04:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:50,807 INFO L225 Difference]: With dead ends: 76 [2020-08-22 23:04:50,808 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 23:04:50,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:04:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 23:04:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-08-22 23:04:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 23:04:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-08-22 23:04:50,823 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-08-22 23:04:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:50,824 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-08-22 23:04:50,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:04:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-08-22 23:04:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 23:04:50,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:50,826 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:50,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:04:50,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash 156681780, now seen corresponding path program 1 times [2020-08-22 23:04:50,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:50,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079848993] [2020-08-22 23:04:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 23:04:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-22 23:04:50,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079848993] [2020-08-22 23:04:50,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:50,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:04:50,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336381544] [2020-08-22 23:04:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:04:50,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:04:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:04:50,909 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-08-22 23:04:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:50,989 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-08-22 23:04:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:04:50,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-22 23:04:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:50,992 INFO L225 Difference]: With dead ends: 89 [2020-08-22 23:04:50,992 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 23:04:50,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:04:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 23:04:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-08-22 23:04:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 23:04:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-08-22 23:04:51,012 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 44 [2020-08-22 23:04:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:51,013 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-08-22 23:04:51,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:04:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-08-22 23:04:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 23:04:51,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:51,015 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:51,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:04:51,016 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1839058219, now seen corresponding path program 2 times [2020-08-22 23:04:51,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:51,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572985973] [2020-08-22 23:04:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 23:04:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 23:04:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572985973] [2020-08-22 23:04:51,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:51,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:04:51,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258507648] [2020-08-22 23:04:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:04:51,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:04:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:04:51,184 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 7 states. [2020-08-22 23:04:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:51,308 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2020-08-22 23:04:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:04:51,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-08-22 23:04:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:51,311 INFO L225 Difference]: With dead ends: 107 [2020-08-22 23:04:51,311 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 23:04:51,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:04:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 23:04:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-08-22 23:04:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 23:04:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-08-22 23:04:51,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 58 [2020-08-22 23:04:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:51,333 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-08-22 23:04:51,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:04:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-08-22 23:04:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 23:04:51,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:51,340 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:51,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:04:51,341 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -101962, now seen corresponding path program 3 times [2020-08-22 23:04:51,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:51,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833077287] [2020-08-22 23:04:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 23:04:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 23:04:51,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833077287] [2020-08-22 23:04:51,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:51,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:04:51,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127891495] [2020-08-22 23:04:51,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:04:51,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:04:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:04:51,528 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 9 states. [2020-08-22 23:04:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:51,670 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2020-08-22 23:04:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:04:51,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-22 23:04:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:51,676 INFO L225 Difference]: With dead ends: 125 [2020-08-22 23:04:51,676 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 23:04:51,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:04:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 23:04:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-08-22 23:04:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 23:04:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-08-22 23:04:51,710 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 72 [2020-08-22 23:04:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:51,712 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-08-22 23:04:51,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:04:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-08-22 23:04:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 23:04:51,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:51,715 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:51,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:04:51,716 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1976659241, now seen corresponding path program 4 times [2020-08-22 23:04:51,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:51,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445135126] [2020-08-22 23:04:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 23:04:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 23:04:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 40 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-22 23:04:51,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445135126] [2020-08-22 23:04:51,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:51,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:04:51,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566021200] [2020-08-22 23:04:51,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:04:51,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:04:51,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:04:51,954 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 11 states. [2020-08-22 23:04:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:52,166 INFO L93 Difference]: Finished difference Result 143 states and 175 transitions. [2020-08-22 23:04:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:04:52,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-08-22 23:04:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:52,177 INFO L225 Difference]: With dead ends: 143 [2020-08-22 23:04:52,177 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 23:04:52,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:04:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 23:04:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-08-22 23:04:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 23:04:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-08-22 23:04:52,224 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 86 [2020-08-22 23:04:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:52,224 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-08-22 23:04:52,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:04:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-08-22 23:04:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 23:04:52,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:52,226 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:52,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:04:52,227 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1582933560, now seen corresponding path program 5 times [2020-08-22 23:04:52,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:52,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787759027] [2020-08-22 23:04:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 23:04:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 23:04:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 23:04:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 23:04:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 40 proven. 65 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-22 23:04:52,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787759027] [2020-08-22 23:04:52,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:52,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:04:52,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967718816] [2020-08-22 23:04:52,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:04:52,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:04:52,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:04:52,403 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 13 states. [2020-08-22 23:04:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:52,626 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2020-08-22 23:04:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:04:52,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2020-08-22 23:04:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:52,629 INFO L225 Difference]: With dead ends: 161 [2020-08-22 23:04:52,629 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 23:04:52,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:04:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 23:04:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-08-22 23:04:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 23:04:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2020-08-22 23:04:52,669 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 100 [2020-08-22 23:04:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:52,670 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2020-08-22 23:04:52,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:04:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2020-08-22 23:04:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 23:04:52,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:52,679 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:52,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:04:52,679 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1615510489, now seen corresponding path program 6 times [2020-08-22 23:04:52,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:52,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331747128] [2020-08-22 23:04:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 23:04:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 23:04:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 23:04:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 23:04:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 23:04:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 47 proven. 96 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-22 23:04:52,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331747128] [2020-08-22 23:04:52,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:52,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:04:52,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545212554] [2020-08-22 23:04:52,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:04:52,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:04:52,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:04:52,894 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 15 states. [2020-08-22 23:04:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:53,198 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-08-22 23:04:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:04:53,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-08-22 23:04:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:53,201 INFO L225 Difference]: With dead ends: 179 [2020-08-22 23:04:53,202 INFO L226 Difference]: Without dead ends: 127 [2020-08-22 23:04:53,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:04:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-08-22 23:04:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-08-22 23:04:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 23:04:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2020-08-22 23:04:53,220 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 114 [2020-08-22 23:04:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:53,221 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2020-08-22 23:04:53,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:04:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2020-08-22 23:04:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 23:04:53,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:53,223 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:53,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:04:53,224 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash 724624314, now seen corresponding path program 7 times [2020-08-22 23:04:53,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:53,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47986628] [2020-08-22 23:04:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 23:04:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 23:04:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 23:04:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 23:04:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 23:04:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 23:04:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-22 23:04:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 54 proven. 133 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-22 23:04:53,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47986628] [2020-08-22 23:04:53,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:53,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:04:53,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519767512] [2020-08-22 23:04:53,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:04:53,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:04:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:04:53,444 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand 17 states. [2020-08-22 23:04:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:53,803 INFO L93 Difference]: Finished difference Result 189 states and 235 transitions. [2020-08-22 23:04:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 23:04:53,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 128 [2020-08-22 23:04:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:53,807 INFO L225 Difference]: With dead ends: 189 [2020-08-22 23:04:53,808 INFO L226 Difference]: Without dead ends: 131 [2020-08-22 23:04:53,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:04:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-22 23:04:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-08-22 23:04:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 23:04:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-08-22 23:04:53,829 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 128 [2020-08-22 23:04:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:53,831 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-08-22 23:04:53,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:04:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-08-22 23:04:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-22 23:04:53,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:53,836 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:53,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:04:53,837 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1386163675, now seen corresponding path program 8 times [2020-08-22 23:04:53,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:53,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146959709] [2020-08-22 23:04:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 23:04:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-22 23:04:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 23:04:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 23:04:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 23:04:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 23:04:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 23:04:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 23:04:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 23:04:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 23:04:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 23:04:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 23:04:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 23:04:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 23:04:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2020-08-22 23:04:53,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146959709] [2020-08-22 23:04:53,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:53,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 23:04:53,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638417953] [2020-08-22 23:04:53,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:04:53,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:04:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:04:53,992 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 7 states. [2020-08-22 23:04:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:54,109 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2020-08-22 23:04:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:04:54,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-08-22 23:04:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:54,110 INFO L225 Difference]: With dead ends: 133 [2020-08-22 23:04:54,110 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:04:54,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:04:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:04:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:04:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:04:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:04:54,114 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2020-08-22 23:04:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:54,115 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:04:54,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:04:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:04:54,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:04:54,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:04:54,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:04:54,896 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-08-22 23:04:55,031 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-08-22 23:04:55,246 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 12 [2020-08-22 23:04:55,424 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-08-22 23:04:55,442 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,442 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,442 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,442 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,443 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,443 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:04:55,443 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:04:55,443 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:04:55,443 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:04:55,443 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:04:55,443 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:04:55,444 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 23) the Hoare annotation is: true [2020-08-22 23:04:55,444 INFO L264 CegarLoopResult]: At program point L19(lines 17 20) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,444 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,444 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:04:55,444 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 23:04:55,445 INFO L264 CegarLoopResult]: At program point L17-3(line 17) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,445 INFO L264 CegarLoopResult]: At program point L17-4(line 17) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,445 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 23) the Hoare annotation is: true [2020-08-22 23:04:55,445 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 20) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,445 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-22 23:04:55,445 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,445 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (< 0 (+ main_~i~0 1)) (<= main_~j~0 7) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,446 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 23:04:55,446 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 23:04:55,446 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 23:04:55,446 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,446 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-08-22 23:04:55,446 INFO L264 CegarLoopResult]: At program point L16-4(line 16) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 0 |main_#t~post1|) (< main_~i~0 main_~nlen~0)) [2020-08-22 23:04:55,447 INFO L271 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: true [2020-08-22 23:04:55,447 INFO L264 CegarLoopResult]: At program point L16-5(line 16) the Hoare annotation is: (and (<= 1 main_~i~0) (<= 0 |main_#t~post1|)) [2020-08-22 23:04:55,447 INFO L264 CegarLoopResult]: At program point L16-6(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-08-22 23:04:55,447 INFO L271 CegarLoopResult]: At program point L16-7(lines 16 21) the Hoare annotation is: true [2020-08-22 23:04:55,447 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:04:55,447 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:04:55,447 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:04:55,448 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:04:55,448 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:04:55,448 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:04:55,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:04:55 BoogieIcfgContainer [2020-08-22 23:04:55,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:04:55,471 INFO L168 Benchmark]: Toolchain (without parser) took 6241.30 ms. Allocated memory was 139.5 MB in the beginning and 294.1 MB in the end (delta: 154.7 MB). Free memory was 103.2 MB in the beginning and 248.9 MB in the end (delta: -145.8 MB). Peak memory consumption was 142.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,472 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,474 INFO L168 Benchmark]: Boogie Preprocessor took 104.96 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,475 INFO L168 Benchmark]: RCFGBuilder took 272.34 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,476 INFO L168 Benchmark]: TraceAbstraction took 5605.43 ms. Allocated memory was 202.9 MB in the beginning and 294.1 MB in the end (delta: 91.2 MB). Free memory was 167.9 MB in the beginning and 248.9 MB in the end (delta: -81.0 MB). Peak memory consumption was 143.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:04:55,479 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.96 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.34 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5605.43 ms. Allocated memory was 202.9 MB in the beginning and 294.1 MB in the end (delta: 91.2 MB). Free memory was 167.9 MB in the beginning and 248.9 MB in the end (delta: -81.0 MB). Peak memory consumption was 143.4 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: 17]: Loop Invariant Derived loop invariant: 0 <= i && i < nlen - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 <= i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 18, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 393 SDtfs, 133 SDslu, 1162 SDs, 0 SdLazy, 414 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 58 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 580 PreInvPairs, 756 NumberOfFragments, 144 HoareAnnotationTreeSize, 580 FomulaSimplifications, 21629 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 34 FomulaSimplificationsInter, 10425 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 817 NumberOfCodeBlocks, 817 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 806 ConstructedInterpolants, 0 QuantifiedInterpolants, 130448 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 2251/2615 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...