/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/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:13:46,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:13:46,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:13:46,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:13:46,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:13:46,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:13:46,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:13:46,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:13:46,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:13:46,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:13:46,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:13:46,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:13:46,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:13:46,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:13:46,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:13:46,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:13:46,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:13:46,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:13:46,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:13:46,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:13:46,590 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 22:13:46,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:13:46,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:13:46,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:13:46,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:13:46,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:13:46,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:13:46,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:13:46,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:13:46,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:13:46,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:13:46,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:13:46,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:13:46,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:13:46,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:13:46,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:13:46,604 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:13:46,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:13:46,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:13:46,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:13:46,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:13:46,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:13:46,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:13:46,606 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 22:13:46,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:13:46,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:13:46,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:13:46,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:13:46,947 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:13:46,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-08-22 22:13:47,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d1e0c12/ec7234d0dd1d4cfca4ba5f2c9d992fba/FLAG6def55eaf [2020-08-22 22:13:47,536 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:13:47,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-08-22 22:13:47,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d1e0c12/ec7234d0dd1d4cfca4ba5f2c9d992fba/FLAG6def55eaf [2020-08-22 22:13:47,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d1e0c12/ec7234d0dd1d4cfca4ba5f2c9d992fba [2020-08-22 22:13:47,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:13:47,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:13:47,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:13:47,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:13:47,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:13:47,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:13:47" (1/1) ... [2020-08-22 22:13:47,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef7a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:47, skipping insertion in model container [2020-08-22 22:13:47,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:13:47" (1/1) ... [2020-08-22 22:13:47,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:13:47,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:13:48,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:13:48,116 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:13:48,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:13:48,152 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:13:48,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48 WrapperNode [2020-08-22 22:13:48,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:13:48,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:13:48,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:13:48,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:13:48,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (1/1) ... [2020-08-22 22:13:48,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:13:48,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:13:48,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:13:48,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:13:48,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (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 22:13:48,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:13:48,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:13:48,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:13:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:13:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 22:13:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:13:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-22 22:13:48,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:13:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:13:48,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:13:48,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:13:48,602 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 22:13:48,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:13:48 BoogieIcfgContainer [2020-08-22 22:13:48,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:13:48,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:13:48,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:13:48,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:13:48,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:13:47" (1/3) ... [2020-08-22 22:13:48,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38191e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:13:48, skipping insertion in model container [2020-08-22 22:13:48,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:13:48" (2/3) ... [2020-08-22 22:13:48,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38191e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:13:48, skipping insertion in model container [2020-08-22 22:13:48,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:13:48" (3/3) ... [2020-08-22 22:13:48,619 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-08-22 22:13:48,632 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:13:48,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:13:48,685 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:13:48,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:13:48,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:13:48,738 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:13:48,739 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:13:48,739 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:13:48,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:13:48,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:13:48,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:13:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-08-22 22:13:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 22:13:48,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:48,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:13:48,774 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:48,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -936940309, now seen corresponding path program 1 times [2020-08-22 22:13:48,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:48,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980886197] [2020-08-22 22:13:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:48,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:48,938 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 22:13:48,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980886197] [2020-08-22 22:13:48,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:48,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:48,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792243798] [2020-08-22 22:13:48,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:48,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:48,969 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-08-22 22:13:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:49,098 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-08-22 22:13:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:49,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 22:13:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:49,113 INFO L225 Difference]: With dead ends: 110 [2020-08-22 22:13:49,113 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 22:13:49,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 22:13:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 22:13:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 22:13:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-08-22 22:13:49,172 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 15 [2020-08-22 22:13:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:49,172 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-08-22 22:13:49,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-08-22 22:13:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 22:13:49,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:49,175 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] [2020-08-22 22:13:49,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:13:49,175 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1261763386, now seen corresponding path program 1 times [2020-08-22 22:13:49,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:49,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667017793] [2020-08-22 22:13:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,219 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 22:13:49,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667017793] [2020-08-22 22:13:49,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:49,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:49,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408548631] [2020-08-22 22:13:49,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:49,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:49,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:49,224 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 3 states. [2020-08-22 22:13:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:49,306 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-08-22 22:13:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:49,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 22:13:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:49,309 INFO L225 Difference]: With dead ends: 134 [2020-08-22 22:13:49,309 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 22:13:49,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 22:13:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-08-22 22:13:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 22:13:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-08-22 22:13:49,329 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 22 [2020-08-22 22:13:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:49,329 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-08-22 22:13:49,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-08-22 22:13:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 22:13:49,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:49,331 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] [2020-08-22 22:13:49,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:13:49,332 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1258903450, now seen corresponding path program 1 times [2020-08-22 22:13:49,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:49,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979576615] [2020-08-22 22:13:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,368 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 22:13:49,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979576615] [2020-08-22 22:13:49,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:49,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:49,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805473926] [2020-08-22 22:13:49,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:49,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:49,371 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 3 states. [2020-08-22 22:13:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:49,448 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-08-22 22:13:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:49,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 22:13:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:49,450 INFO L225 Difference]: With dead ends: 140 [2020-08-22 22:13:49,451 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 22:13:49,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 22:13:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-22 22:13:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 22:13:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-08-22 22:13:49,473 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 22 [2020-08-22 22:13:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:49,474 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-08-22 22:13:49,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-08-22 22:13:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:13:49,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:49,476 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-08-22 22:13:49,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:13:49,476 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash 122238776, now seen corresponding path program 1 times [2020-08-22 22:13:49,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:49,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498998470] [2020-08-22 22:13:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 22:13:49,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498998470] [2020-08-22 22:13:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:49,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:49,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354935472] [2020-08-22 22:13:49,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:49,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:49,535 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 3 states. [2020-08-22 22:13:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:49,680 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-08-22 22:13:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:49,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 22:13:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:49,687 INFO L225 Difference]: With dead ends: 200 [2020-08-22 22:13:49,687 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 22:13:49,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 22:13:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-22 22:13:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 22:13:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2020-08-22 22:13:49,737 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 30 [2020-08-22 22:13:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:49,741 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2020-08-22 22:13:49,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2020-08-22 22:13:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 22:13:49,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:49,744 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2020-08-22 22:13:49,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:13:49,746 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1207592178, now seen corresponding path program 1 times [2020-08-22 22:13:49,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:49,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948203332] [2020-08-22 22:13:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 22:13:49,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948203332] [2020-08-22 22:13:49,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:49,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:49,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100925785] [2020-08-22 22:13:49,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:49,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:49,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:49,828 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 3 states. [2020-08-22 22:13:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:49,906 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-08-22 22:13:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:49,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-08-22 22:13:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:49,909 INFO L225 Difference]: With dead ends: 248 [2020-08-22 22:13:49,909 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 22:13:49,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 22:13:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-08-22 22:13:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 22:13:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-08-22 22:13:49,927 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 34 [2020-08-22 22:13:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:49,928 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-08-22 22:13:49,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-08-22 22:13:49,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 22:13:49,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:13:49,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-08-22 22:13:49,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:13:49,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:13:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:13:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash 340924863, now seen corresponding path program 1 times [2020-08-22 22:13:49,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:13:49,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565506374] [2020-08-22 22:13:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:13:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:49,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:13:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:13:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 22:13:50,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565506374] [2020-08-22 22:13:50,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:13:50,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:13:50,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208218950] [2020-08-22 22:13:50,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:13:50,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:13:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:13:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:13:50,009 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 3 states. [2020-08-22 22:13:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:13:50,037 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-08-22 22:13:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:13:50,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-22 22:13:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:13:50,040 INFO L225 Difference]: With dead ends: 157 [2020-08-22 22:13:50,040 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:13:50,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:13:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:13:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:13:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:13:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:13:50,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-08-22 22:13:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:13:50,047 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:13:50,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:13:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:13:50,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:13:50,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:13:50,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:13:50,649 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,649 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,649 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,650 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,650 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,650 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:13:50,650 INFO L264 CegarLoopResult]: At program point L93(line 93) the Hoare annotation is: false [2020-08-22 22:13:50,650 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 8 140) the Hoare annotation is: true [2020-08-22 22:13:50,651 INFO L264 CegarLoopResult]: At program point L77-1(lines 53 106) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (not (= main_~s__hit~0 0))) (and .cse0 (<= main_~blastFlag~0 2)))) [2020-08-22 22:13:50,651 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-08-22 22:13:50,651 INFO L264 CegarLoopResult]: At program point L69(lines 69 73) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,651 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (or (and (<= main_~blastFlag~0 2) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 0)) [2020-08-22 22:13:50,651 INFO L264 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) [2020-08-22 22:13:50,652 INFO L264 CegarLoopResult]: At program point L45(lines 45 110) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,652 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-08-22 22:13:50,652 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-08-22 22:13:50,652 INFO L264 CegarLoopResult]: At program point L70(line 70) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,652 INFO L264 CegarLoopResult]: At program point L95(lines 95 97) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-08-22 22:13:50,653 INFO L264 CegarLoopResult]: At program point L29(lines 29 124) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,653 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))))) [2020-08-22 22:13:50,653 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 8 140) the Hoare annotation is: true [2020-08-22 22:13:50,653 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-08-22 22:13:50,654 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) the Hoare annotation is: false [2020-08-22 22:13:50,654 INFO L264 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,654 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,654 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-08-22 22:13:50,654 INFO L264 CegarLoopResult]: At program point L88-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-08-22 22:13:50,654 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 22:13:50,655 INFO L264 CegarLoopResult]: At program point L72(line 72) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,655 INFO L264 CegarLoopResult]: At program point L89(line 89) the Hoare annotation is: (and (<= main_~blastFlag~0 2) (<= 8656 main_~s__state~0)) [2020-08-22 22:13:50,655 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 22:13:50,655 INFO L264 CegarLoopResult]: At program point L139(line 139) the Hoare annotation is: false [2020-08-22 22:13:50,655 INFO L264 CegarLoopResult]: At program point L24(lines 24 127) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,656 INFO L264 CegarLoopResult]: At program point L57-1(lines 53 106) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,656 INFO L264 CegarLoopResult]: At program point L49(lines 49 108) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,656 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,656 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (<= main_~blastFlag~0 0) [2020-08-22 22:13:50,657 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,657 INFO L264 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,657 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0) (and (<= main_~blastFlag~0 2) .cse0))) [2020-08-22 22:13:50,658 INFO L264 CegarLoopResult]: At program point L100(line 100) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 0) .cse0) (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0))) [2020-08-22 22:13:50,658 INFO L264 CegarLoopResult]: At program point L92-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-08-22 22:13:50,658 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-08-22 22:13:50,658 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-08-22 22:13:50,658 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-08-22 22:13:50,659 INFO L271 CegarLoopResult]: At program point L10-2(line 10) the Hoare annotation is: true [2020-08-22 22:13:50,659 INFO L264 CegarLoopResult]: At program point L68(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,659 INFO L264 CegarLoopResult]: At program point L68-1(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-08-22 22:13:50,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:13:50 BoogieIcfgContainer [2020-08-22 22:13:50,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:13:50,689 INFO L168 Benchmark]: Toolchain (without parser) took 2802.12 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 104.9 MB in the beginning and 113.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 86.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,690 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.78 ms. Allocated memory is still 140.0 MB. Free memory was 104.7 MB in the beginning and 93.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,693 INFO L168 Benchmark]: Boogie Preprocessor took 120.02 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 181.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,694 INFO L168 Benchmark]: RCFGBuilder took 334.69 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 166.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,695 INFO L168 Benchmark]: TraceAbstraction took 2075.73 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 165.5 MB in the beginning and 113.5 MB in the end (delta: 52.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:13:50,700 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.78 ms. Allocated memory is still 140.0 MB. Free memory was 104.7 MB in the beginning and 93.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.02 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 181.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.69 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 166.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2075.73 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 165.5 MB in the beginning and 113.5 MB in the end (delta: 52.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: 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: 49]: Loop Invariant Derived loop invariant: ((blastFlag <= 3 && !(s__hit == 0)) && 8656 <= s__state) || (blastFlag <= 2 && 8656 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (8640 <= s__state && blastFlag <= 2) || ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 8]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 295 SDtfs, 129 SDslu, 194 SDs, 0 SdLazy, 106 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 48 LocationsWithAnnotation, 48 PreInvPairs, 162 NumberOfFragments, 272 HoareAnnotationTreeSize, 48 FomulaSimplifications, 975 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 48 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 9052 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 42/42 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...