/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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:14:50,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:14:50,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:14:50,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:14:50,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:14:50,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:14:50,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:14:50,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:14:50,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:14:50,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:14:50,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:14:50,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:14:50,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:14:50,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:14:50,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:14:50,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:14:50,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:14:50,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:14:50,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:14:50,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:14:50,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:14:50,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:14:50,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:14:50,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:14:50,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:14:50,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:14:50,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:14:50,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:14:50,406 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 23:14:50,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:14:50,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:14:50,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:14:50,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:14:50,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:14:50,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:14:50,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:14:50,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:14:50,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:14:50,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:14:50,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:14:50,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:14:50,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:14:50,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:14:50,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:14:50,441 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:14:50,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:14:50,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:14:50,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:14:50,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:14:50,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:14:50,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:14:50,444 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 23:14:50,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:14:50,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:14:50,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:14:50,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:14:50,893 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:14:50,894 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-22 23:14:51,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9180e843/c3b9697030204afb8721071293ba999d/FLAG26649e234 [2020-08-22 23:14:51,726 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:14:51,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-22 23:14:51,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9180e843/c3b9697030204afb8721071293ba999d/FLAG26649e234 [2020-08-22 23:14:52,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9180e843/c3b9697030204afb8721071293ba999d [2020-08-22 23:14:52,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:14:52,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:14:52,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:52,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:14:52,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:14:52,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6589a4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52, skipping insertion in model container [2020-08-22 23:14:52,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:14:52,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:14:52,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:52,460 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:14:52,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:52,503 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:14:52,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52 WrapperNode [2020-08-22 23:14:52,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:52,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:14:52,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:14:52,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:14:52,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (1/1) ... [2020-08-22 23:14:52,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:14:52,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:14:52,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:14:52,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:14:52,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (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 23:14:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:14:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:14:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:14:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:14:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:14:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:14:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:14:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:14:53,090 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:14:53,091 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:14:53,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:53 BoogieIcfgContainer [2020-08-22 23:14:53,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:14:53,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:14:53,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:14:53,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:14:53,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:14:52" (1/3) ... [2020-08-22 23:14:53,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e588ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:53, skipping insertion in model container [2020-08-22 23:14:53,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:52" (2/3) ... [2020-08-22 23:14:53,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e588ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:53, skipping insertion in model container [2020-08-22 23:14:53,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:53" (3/3) ... [2020-08-22 23:14:53,111 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-22 23:14:53,127 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:14:53,139 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:14:53,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:14:53,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:14:53,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:14:53,192 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:14:53,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:14:53,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:14:53,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:14:53,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:14:53,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:14:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-08-22 23:14:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 23:14:53,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:53,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:53,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2048298944, now seen corresponding path program 1 times [2020-08-22 23:14:53,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:53,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695209007] [2020-08-22 23:14:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:54,087 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-08-22 23:14:54,267 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-08-22 23:14:54,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:54,408 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 23:14:54,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695209007] [2020-08-22 23:14:54,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:14:54,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 23:14:54,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808195592] [2020-08-22 23:14:54,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:14:54,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:14:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:14:54,449 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 11 states. [2020-08-22 23:14:54,935 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-08-22 23:14:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:55,782 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2020-08-22 23:14:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:14:55,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-08-22 23:14:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:55,801 INFO L225 Difference]: With dead ends: 109 [2020-08-22 23:14:55,802 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 23:14:55,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:14:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 23:14:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 31. [2020-08-22 23:14:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 23:14:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-22 23:14:55,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2020-08-22 23:14:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:55,899 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-22 23:14:55,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:14:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-22 23:14:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:14:55,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:55,901 INFO L422 BasicCegarLoop]: trace histogram [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 23:14:55,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:14:55,902 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1303654892, now seen corresponding path program 1 times [2020-08-22 23:14:55,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:55,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944161884] [2020-08-22 23:14:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:56,954 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-08-22 23:14:57,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:57,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944161884] [2020-08-22 23:14:57,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:57,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:14:57,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258318131] [2020-08-22 23:14:57,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:14:57,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:14:57,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:14:57,253 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 17 states. [2020-08-22 23:14:58,123 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-08-22 23:14:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:58,965 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2020-08-22 23:14:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:14:58,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-08-22 23:14:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:58,969 INFO L225 Difference]: With dead ends: 76 [2020-08-22 23:14:58,970 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 23:14:58,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:14:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 23:14:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-08-22 23:14:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 23:14:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-22 23:14:58,993 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 24 [2020-08-22 23:14:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:58,993 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-22 23:14:58,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:14:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-22 23:14:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 23:14:58,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:58,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:58,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:14:58,996 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash -132325864, now seen corresponding path program 2 times [2020-08-22 23:14:58,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:58,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627146352] [2020-08-22 23:14:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:59,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627146352] [2020-08-22 23:14:59,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:59,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:14:59,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865077664] [2020-08-22 23:14:59,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:14:59,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:14:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:14:59,126 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-22 23:14:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:59,363 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-08-22 23:14:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:14:59,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 23:14:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:59,366 INFO L225 Difference]: With dead ends: 55 [2020-08-22 23:14:59,366 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 23:14:59,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:14:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 23:14:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-08-22 23:14:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 23:14:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-08-22 23:14:59,395 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2020-08-22 23:14:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:59,396 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-08-22 23:14:59,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:14:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-08-22 23:14:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 23:14:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:59,399 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] [2020-08-22 23:14:59,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:14:59,400 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1365663380, now seen corresponding path program 1 times [2020-08-22 23:14:59,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:59,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956481950] [2020-08-22 23:14:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:59,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956481950] [2020-08-22 23:14:59,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:59,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:14:59,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179008797] [2020-08-22 23:14:59,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:14:59,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:14:59,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:14:59,848 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2020-08-22 23:15:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:02,525 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-22 23:15:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:15:02,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-08-22 23:15:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:02,528 INFO L225 Difference]: With dead ends: 55 [2020-08-22 23:15:02,528 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 23:15:02,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:15:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 23:15:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-08-22 23:15:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 23:15:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-22 23:15:02,570 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-08-22 23:15:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:02,570 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-22 23:15:02,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:15:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-22 23:15:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 23:15:02,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:02,572 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 23:15:02,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:15:02,573 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash 85634078, now seen corresponding path program 1 times [2020-08-22 23:15:02,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:02,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136104871] [2020-08-22 23:15:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:02,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:02,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136104871] [2020-08-22 23:15:02,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:02,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:15:02,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720771834] [2020-08-22 23:15:02,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:15:02,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:15:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:15:02,669 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 5 states. [2020-08-22 23:15:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:02,867 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-08-22 23:15:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:15:02,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 23:15:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:02,870 INFO L225 Difference]: With dead ends: 53 [2020-08-22 23:15:02,873 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 23:15:02,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:15:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 23:15:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 23:15:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:15:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-08-22 23:15:02,901 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-08-22 23:15:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:02,902 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-08-22 23:15:02,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:15:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-08-22 23:15:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 23:15:02,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:02,908 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 23:15:02,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:15:02,909 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash -613358466, now seen corresponding path program 1 times [2020-08-22 23:15:02,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:02,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302528411] [2020-08-22 23:15:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:04,075 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-08-22 23:15:04,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:04,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302528411] [2020-08-22 23:15:04,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:04,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:15:04,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957564893] [2020-08-22 23:15:04,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:15:04,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:15:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:15:04,444 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 19 states. [2020-08-22 23:15:05,410 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-08-22 23:15:05,591 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-08-22 23:15:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:06,390 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-08-22 23:15:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:15:06,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-08-22 23:15:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:06,401 INFO L225 Difference]: With dead ends: 62 [2020-08-22 23:15:06,402 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 23:15:06,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:15:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 23:15:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-08-22 23:15:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 23:15:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-08-22 23:15:06,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 30 [2020-08-22 23:15:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:06,448 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-08-22 23:15:06,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:15:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-08-22 23:15:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 23:15:06,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:06,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 23:15:06,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:15:06,454 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash 473561002, now seen corresponding path program 2 times [2020-08-22 23:15:06,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:06,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480988587] [2020-08-22 23:15:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:06,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480988587] [2020-08-22 23:15:06,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:06,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:15:06,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019957380] [2020-08-22 23:15:06,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:15:06,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:06,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:15:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:15:06,643 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 6 states. [2020-08-22 23:15:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:06,950 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-08-22 23:15:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:15:06,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-08-22 23:15:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:06,953 INFO L225 Difference]: With dead ends: 61 [2020-08-22 23:15:06,953 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 23:15:06,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:15:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 23:15:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-08-22 23:15:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 23:15:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-22 23:15:06,977 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-08-22 23:15:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:06,978 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-22 23:15:06,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:15:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-22 23:15:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 23:15:06,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:06,980 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 23:15:06,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:15:06,980 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash 236960282, now seen corresponding path program 1 times [2020-08-22 23:15:06,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:06,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390909690] [2020-08-22 23:15:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:07,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:07,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390909690] [2020-08-22 23:15:07,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:07,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:15:07,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780903035] [2020-08-22 23:15:07,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:15:07,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:07,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:15:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:15:07,526 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2020-08-22 23:15:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:20,693 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-22 23:15:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:15:20,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-08-22 23:15:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:20,699 INFO L225 Difference]: With dead ends: 60 [2020-08-22 23:15:20,699 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 23:15:20,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:15:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 23:15:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 23:15:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:15:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-08-22 23:15:20,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-08-22 23:15:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:20,750 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-08-22 23:15:20,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:15:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-08-22 23:15:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 23:15:20,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:20,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 23:15:20,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:15:20,754 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:20,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1772639952, now seen corresponding path program 1 times [2020-08-22 23:15:20,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:20,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966785289] [2020-08-22 23:15:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:22,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:22,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966785289] [2020-08-22 23:15:22,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:22,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:15:22,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588760931] [2020-08-22 23:15:22,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:15:22,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:22,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:15:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:15:22,119 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 21 states. [2020-08-22 23:15:23,300 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-08-22 23:15:23,598 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-08-22 23:15:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:30,552 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-08-22 23:15:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:15:30,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-08-22 23:15:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:30,561 INFO L225 Difference]: With dead ends: 70 [2020-08-22 23:15:30,561 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 23:15:30,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:15:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 23:15:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-22 23:15:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 23:15:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-08-22 23:15:30,583 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 36 [2020-08-22 23:15:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:30,583 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-08-22 23:15:30,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:15:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-08-22 23:15:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 23:15:30,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:30,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-08-22 23:15:30,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:15:30,585 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash -940895396, now seen corresponding path program 2 times [2020-08-22 23:15:30,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:30,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543511484] [2020-08-22 23:15:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:30,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:30,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543511484] [2020-08-22 23:15:30,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:30,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 23:15:30,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149106605] [2020-08-22 23:15:30,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:15:30,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:15:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:15:30,697 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 7 states. [2020-08-22 23:15:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:31,002 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-22 23:15:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:15:31,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-22 23:15:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:31,004 INFO L225 Difference]: With dead ends: 64 [2020-08-22 23:15:31,004 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 23:15:31,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:15:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 23:15:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 23:15:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 23:15:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-08-22 23:15:31,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2020-08-22 23:15:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:31,051 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-08-22 23:15:31,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:15:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-08-22 23:15:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:15:31,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:31,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-22 23:15:31,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:15:31,058 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash -661515096, now seen corresponding path program 1 times [2020-08-22 23:15:31,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:31,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998802813] [2020-08-22 23:15:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 23:15:31,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998802813] [2020-08-22 23:15:31,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:15:31,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 23:15:31,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578686151] [2020-08-22 23:15:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:15:31,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:15:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:15:31,361 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 11 states. [2020-08-22 23:15:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:31,968 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-08-22 23:15:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:15:31,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-08-22 23:15:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:31,970 INFO L225 Difference]: With dead ends: 49 [2020-08-22 23:15:31,970 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:15:31,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:15:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:15:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:15:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:15:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:15:31,975 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-22 23:15:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:31,975 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:15:31,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:15:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:15:31,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:15:31,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:15:31,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:15:32,729 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-08-22 23:15:33,050 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-08-22 23:15:33,421 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-08-22 23:15:33,524 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-08-22 23:15:33,685 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-08-22 23:15:33,972 INFO L264 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-22 23:15:33,972 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-22 23:15:33,973 INFO L264 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-22 23:15:33,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:15:33,973 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-22 23:15:33,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:15:33,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:15:33,974 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:15:33,974 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:15:33,974 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:15:33,974 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:15:33,975 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:15:33,975 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-08-22 23:15:33,976 INFO L264 CegarLoopResult]: At program point L25(lines 25 28) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= (let ((.cse3 (div main_~l~0 4294967296))) (let ((.cse2 (* .cse3 (- 4294967296)))) (let ((.cse1 (div (+ main_~l~0 .cse2) 3))) (+ (* 6 .cse1) (* 8589934593 (div (+ (* .cse1 (- 3)) main_~l~0 .cse2) 4294967296)) (* 8589934592 .cse3) 2)))) (* 2 main_~l~0)) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,976 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 14 33) the Hoare annotation is: true [2020-08-22 23:15:33,976 INFO L264 CegarLoopResult]: At program point L23(lines 23 28) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,976 INFO L264 CegarLoopResult]: At program point L25-2(lines 21 28) the Hoare annotation is: (or (let ((.cse1 (+ main_~l~0 1)) (.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,976 INFO L264 CegarLoopResult]: At program point L21(lines 21 28) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,976 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse2 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse1 (+ main_~i~0 main_~k~0))) (and (<= .cse0 main_~l~0) (<= 0 .cse1) (<= main_~i~0 0) (<= main_~l~0 .cse2) (<= 0 main_~i~0) (<= .cse2 main_~l~0) (<= main_~l~0 0) (<= main_~l~0 .cse0) (<= .cse1 0) (<= 0 main_~l~0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse2 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse1 (+ main_~i~0 main_~k~0))) (and (<= .cse0 main_~l~0) (<= 0 .cse1) (<= main_~i~0 0) (<= main_~l~0 .cse2) (<= 0 main_~i~0) (<= .cse2 main_~l~0) (<= main_~l~0 0) (<= main_~l~0 .cse0) (<= .cse1 0) (<= 0 main_~l~0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (let ((.cse1 (+ (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296)) main_~l~0)) (.cse0 (* 4294967296 (div main_~l~0 4294967296)))) (and (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse0) .cse1) (< .cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L17-2(line 17) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse2 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse1 (+ main_~i~0 main_~k~0))) (and (<= .cse0 main_~l~0) (<= 0 .cse1) (<= main_~i~0 0) (<= main_~l~0 .cse2) (<= 0 main_~i~0) (<= .cse2 main_~l~0) (<= main_~l~0 0) (<= main_~l~0 .cse0) (<= .cse1 0) (<= 0 main_~l~0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (<= main_~i~0 0) (<= 0 main_~i~0)) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= 0 .cse0) (<= main_~i~0 0) (<= 0 main_~i~0) (<= .cse0 0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,977 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 14 33) the Hoare annotation is: true [2020-08-22 23:15:33,978 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~k~0))) (and (<= 0 .cse0) (<= 0 .cse1) (<= main_~i~0 0) (<= .cse1 0) (<= 0 main_~i~0) (<= .cse0 0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,978 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-22 23:15:33,978 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= (let ((.cse3 (div main_~l~0 4294967296))) (let ((.cse2 (* .cse3 (- 4294967296)))) (let ((.cse1 (div (+ main_~l~0 .cse2) 3))) (+ (* 6 .cse1) (* 8589934593 (div (+ (* .cse1 (- 3)) main_~l~0 .cse2) 4294967296)) (* 8589934592 .cse3) 2)))) (* 2 main_~l~0)) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,978 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= (let ((.cse3 (div main_~l~0 4294967296))) (let ((.cse2 (* .cse3 (- 4294967296)))) (let ((.cse1 (div (+ main_~l~0 .cse2) 3))) (+ (* 6 .cse1) (* 8589934593 (div (+ (* .cse1 (- 3)) main_~l~0 .cse2) 4294967296)) (* 8589934592 .cse3) 2)))) (* 2 main_~l~0)) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,978 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,979 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,979 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse2 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse1 (+ main_~i~0 main_~k~0))) (and (<= .cse0 main_~l~0) (<= 0 .cse1) (<= main_~i~0 0) (<= main_~l~0 .cse2) (<= 0 main_~i~0) (<= .cse2 main_~l~0) (<= main_~l~0 0) (<= main_~l~0 .cse0) (<= .cse1 0) (<= 0 main_~l~0))) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,979 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~k~0)) (.cse3 (div main_~l~0 4294967296)) (.cse2 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (and (<= 0 .cse0) (<= 0 .cse1) (<= main_~i~0 0) (<= .cse1 0) (<= main_~l~0 .cse1) (<= 0 main_~i~0) (< .cse2 (+ .cse3 1)) (<= .cse1 main_~l~0) (<= .cse0 0) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (* 4294967296 .cse3)) (+ (* 4294967296 .cse2) main_~l~0))))) [2020-08-22 23:15:33,979 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0)) (.cse0 (+ main_~i~0 main_~k~0))) (and (<= 0 .cse0) (<= main_~i~0 0) (<= main_~l~0 .cse1) (<= 0 main_~i~0) (<= .cse1 main_~l~0) (<= main_~l~0 0) (<= .cse0 0) (<= 0 main_~l~0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-22 23:15:33,979 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:15:33,979 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 23:15:33,979 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:15:33,980 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 23:15:33,980 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 23:15:33,980 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:15:34,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:15:34 BoogieIcfgContainer [2020-08-22 23:15:34,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:15:34,012 INFO L168 Benchmark]: Toolchain (without parser) took 41895.05 ms. Allocated memory was 140.5 MB in the beginning and 322.4 MB in the end (delta: 181.9 MB). Free memory was 104.4 MB in the beginning and 203.4 MB in the end (delta: -99.1 MB). Peak memory consumption was 172.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,013 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.43 ms. Allocated memory is still 140.5 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,015 INFO L168 Benchmark]: Boogie Preprocessor took 161.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,016 INFO L168 Benchmark]: RCFGBuilder took 430.43 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 167.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,017 INFO L168 Benchmark]: TraceAbstraction took 40909.72 ms. Allocated memory was 203.4 MB in the beginning and 322.4 MB in the end (delta: 119.0 MB). Free memory was 167.2 MB in the beginning and 203.4 MB in the end (delta: -36.2 MB). Peak memory consumption was 172.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:15:34,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.43 ms. Allocated memory is still 140.5 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 161.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.43 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 167.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40909.72 ms. Allocated memory was 203.4 MB in the beginning and 322.4 MB in the end (delta: 119.0 MB). Free memory was 167.2 MB in the beginning and 203.4 MB in the end (delta: -36.2 MB). Peak memory consumption was 172.2 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: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - ProcedureContractResult [Line: 14]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.7s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 31.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 238 SDtfs, 1339 SDslu, 368 SDs, 0 SdLazy, 1957 SolverSat, 240 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 23.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 118 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 109 PreInvPairs, 184 NumberOfFragments, 911 HoareAnnotationTreeSize, 109 FomulaSimplifications, 555078 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1408 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 146918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 55/113 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...