/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:47:49,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:47:49,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:47:49,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:47:49,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:47:50,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:47:50,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:47:50,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:47:50,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:47:50,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:47:50,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:47:50,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:47:50,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:47:50,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:47:50,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:47:50,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:47:50,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:47:50,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:47:50,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:47:50,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:47:50,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:47:50,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:47:50,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:47:50,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:47:50,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:47:50,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:47:50,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:47:50,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:47:50,060 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 19:47:50,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:47:50,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:47:50,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:47:50,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:47:50,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:47:50,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:47:50,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:47:50,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:47:50,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:47:50,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:47:50,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:47:50,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:47:50,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:47:50,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:47:50,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:47:50,081 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:47:50,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:47:50,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:47:50,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:50,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:47:50,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:47:50,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:47:50,083 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:47:50,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:47:50,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:47:50,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:47:50,372 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:47:50,373 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:47:50,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-08-22 19:47:50,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd473953/c9472df1130b40eda55121fcc548c2ee/FLAG55f274d06 [2020-08-22 19:47:50,937 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:47:50,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-08-22 19:47:50,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd473953/c9472df1130b40eda55121fcc548c2ee/FLAG55f274d06 [2020-08-22 19:47:51,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd473953/c9472df1130b40eda55121fcc548c2ee [2020-08-22 19:47:51,316 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:47:51,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:47:51,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:51,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:47:51,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:47:51,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5a9f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51, skipping insertion in model container [2020-08-22 19:47:51,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:47:51,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:47:51,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:51,529 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:47:51,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:51,563 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:47:51,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51 WrapperNode [2020-08-22 19:47:51,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:51,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:47:51,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:47:51,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:47:51,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (1/1) ... [2020-08-22 19:47:51,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:47:51,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:47:51,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:47:51,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:47:51,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (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 19:47:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:47:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:47:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:47:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:47:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:47:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:47:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:47:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:47:51,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:47:51,975 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:47:51,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:51 BoogieIcfgContainer [2020-08-22 19:47:51,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:47:51,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:47:51,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:47:51,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:47:51,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:47:51" (1/3) ... [2020-08-22 19:47:51,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46edcb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:51, skipping insertion in model container [2020-08-22 19:47:51,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:51" (2/3) ... [2020-08-22 19:47:51,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46edcb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:51, skipping insertion in model container [2020-08-22 19:47:51,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:51" (3/3) ... [2020-08-22 19:47:51,991 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-08-22 19:47:52,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:47:52,012 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:47:52,033 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:47:52,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:47:52,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:47:52,063 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:47:52,063 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:47:52,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:47:52,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:47:52,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:47:52,064 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:47:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 19:47:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:47:52,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:52,101 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 19:47:52,101 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-08-22 19:47:52,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:52,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841771443] [2020-08-22 19:47:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:52,186 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,484 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 19:47:52,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841771443] [2020-08-22 19:47:52,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:52,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:52,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088471716] [2020-08-22 19:47:52,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:52,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:52,513 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-08-22 19:47:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:52,810 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-08-22 19:47:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:47:52,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-08-22 19:47:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:52,823 INFO L225 Difference]: With dead ends: 70 [2020-08-22 19:47:52,823 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 19:47:52,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 19:47:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-08-22 19:47:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 19:47:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-22 19:47:52,879 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-08-22 19:47:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:52,879 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-22 19:47:52,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-22 19:47:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:47:52,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:52,881 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, 1, 1, 1] [2020-08-22 19:47:52,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:47:52,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-08-22 19:47:52,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:52,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094409946] [2020-08-22 19:47:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:52,903 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,222 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 19:47:53,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094409946] [2020-08-22 19:47:53,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:53,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:47:53,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928371405] [2020-08-22 19:47:53,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:47:53,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:47:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:47:53,226 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-08-22 19:47:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:53,579 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-08-22 19:47:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:47:53,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-08-22 19:47:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:53,581 INFO L225 Difference]: With dead ends: 53 [2020-08-22 19:47:53,582 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 19:47:53,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:47:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 19:47:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-08-22 19:47:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 19:47:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-08-22 19:47:53,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-08-22 19:47:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:53,596 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-08-22 19:47:53,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:47:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-08-22 19:47:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:47:53,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:53,597 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, 1, 1, 1] [2020-08-22 19:47:53,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:47:53,598 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-08-22 19:47:53,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:53,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753168327] [2020-08-22 19:47:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:54,174 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-08-22 19:47:54,218 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:47:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,441 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 19:47:54,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753168327] [2020-08-22 19:47:54,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:54,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:47:54,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546539166] [2020-08-22 19:47:54,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:47:54,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:47:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:47:54,721 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-08-22 19:47:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:55,171 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-08-22 19:47:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 19:47:55,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-08-22 19:47:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:55,174 INFO L225 Difference]: With dead ends: 56 [2020-08-22 19:47:55,174 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 19:47:55,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:47:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 19:47:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-22 19:47:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:47:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-22 19:47:55,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 27 [2020-08-22 19:47:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:55,197 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-22 19:47:55,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:47:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-22 19:47:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 19:47:55,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:55,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:55,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:47:55,201 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-08-22 19:47:55,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:55,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981487986] [2020-08-22 19:47:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:55,208 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:55,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:55,542 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 19:47:55,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981487986] [2020-08-22 19:47:55,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:55,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:47:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354305788] [2020-08-22 19:47:55,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:47:55,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:47:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:47:55,547 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-08-22 19:47:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:56,020 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-08-22 19:47:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:47:56,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 19:47:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:56,022 INFO L225 Difference]: With dead ends: 64 [2020-08-22 19:47:56,022 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:47:56,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:47:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:47:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-22 19:47:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 19:47:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 19:47:56,034 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 19:47:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:56,035 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 19:47:56,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:47:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 19:47:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 19:47:56,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:56,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:56,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:47:56,037 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-08-22 19:47:56,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:56,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168084138] [2020-08-22 19:47:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:56,043 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:56,296 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 19:47:56,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168084138] [2020-08-22 19:47:56,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:56,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:47:56,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061408333] [2020-08-22 19:47:56,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:47:56,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:47:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:47:56,299 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2020-08-22 19:47:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:56,775 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-22 19:47:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:47:56,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 19:47:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:56,778 INFO L225 Difference]: With dead ends: 76 [2020-08-22 19:47:56,778 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 19:47:56,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:47:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 19:47:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-08-22 19:47:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 19:47:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-08-22 19:47:56,796 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-08-22 19:47:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:56,798 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-08-22 19:47:56,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:47:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-08-22 19:47:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 19:47:56,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:56,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:56,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:47:56,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-08-22 19:47:56,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:56,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496297963] [2020-08-22 19:47:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:56,809 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,080 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 19:47:57,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496297963] [2020-08-22 19:47:57,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:47:57,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284296974] [2020-08-22 19:47:57,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:47:57,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:47:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:47:57,083 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 14 states. [2020-08-22 19:47:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:57,579 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-08-22 19:47:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:47:57,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 19:47:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:57,582 INFO L225 Difference]: With dead ends: 83 [2020-08-22 19:47:57,582 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 19:47:57,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:47:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 19:47:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-08-22 19:47:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 19:47:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-08-22 19:47:57,608 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-08-22 19:47:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:57,609 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-08-22 19:47:57,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:47:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-08-22 19:47:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:47:57,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:57,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 19:47:57,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:47:57,613 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-08-22 19:47:57,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:57,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712947882] [2020-08-22 19:47:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:57,622 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,925 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 19:47:57,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712947882] [2020-08-22 19:47:57,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:47:57,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747519646] [2020-08-22 19:47:57,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:47:57,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:47:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:47:57,928 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-08-22 19:47:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:58,407 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-08-22 19:47:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:47:58,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-08-22 19:47:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:58,408 INFO L225 Difference]: With dead ends: 63 [2020-08-22 19:47:58,409 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:47:58,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:47:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:47:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:47:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:47:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:47:58,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-22 19:47:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:58,411 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:47:58,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:47:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:47:58,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:47:58,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:47:58,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:47:58,858 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,858 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,858 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,858 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:58,859 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:58,859 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:58,859 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:47:58,859 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:47:58,859 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:58,860 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-08-22 19:47:58,860 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 29) the Hoare annotation is: true [2020-08-22 19:47:58,860 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 2)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 (* 3 main_~n~0)))) [2020-08-22 19:47:58,860 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,860 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 19:47:58,861 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,861 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-08-22 19:47:58,861 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,861 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (<= main_~a~0 0) (<= 0 main_~i~0) (<= (* 3 main_~i~0) main_~a~0)) [2020-08-22 19:47:58,861 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 29) the Hoare annotation is: true [2020-08-22 19:47:58,861 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,862 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,862 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,862 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-08-22 19:47:58,862 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,863 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (+ (* 3 main_~i~0) 1))) (and (<= .cse0 .cse1) (<= (+ main_~a~0 main_~b~0 2) (* 3 main_~n~0)) (<= .cse1 .cse0))) [2020-08-22 19:47:58,863 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,863 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 24) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,863 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,863 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,864 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= main_~a~0 0) (<= .cse0 main_~a~0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-08-22 19:47:58,864 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 19:47:58,864 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-08-22 19:47:58,864 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 19:47:58,864 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 24) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-08-22 19:47:58,864 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-08-22 19:47:58,865 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:47:58,865 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 19:47:58,865 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:58,865 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 19:47:58,865 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 19:47:58,866 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:58,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:47:58 BoogieIcfgContainer [2020-08-22 19:47:58,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:47:58,893 INFO L168 Benchmark]: Toolchain (without parser) took 7574.36 ms. Allocated memory was 140.0 MB in the beginning and 277.9 MB in the end (delta: 137.9 MB). Free memory was 104.6 MB in the beginning and 100.9 MB in the end (delta: 3.8 MB). Peak memory consumption was 141.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,894 INFO L168 Benchmark]: CDTParser took 0.19 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.47 ms. Allocated memory is still 140.0 MB. Free memory was 104.4 MB in the beginning and 94.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,896 INFO L168 Benchmark]: Boogie Preprocessor took 112.89 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 94.8 MB in the beginning and 182.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,896 INFO L168 Benchmark]: RCFGBuilder took 303.88 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,897 INFO L168 Benchmark]: TraceAbstraction took 6907.45 ms. Allocated memory was 203.4 MB in the beginning and 277.9 MB in the end (delta: 74.4 MB). Free memory was 167.4 MB in the beginning and 100.9 MB in the end (delta: 66.5 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:58,901 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.47 ms. Allocated memory is still 140.0 MB. Free memory was 104.4 MB in the beginning and 94.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.89 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 94.8 MB in the beginning and 182.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.88 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6907.45 ms. Allocated memory was 203.4 MB in the beginning and 277.9 MB in the end (delta: 74.4 MB). Free memory was 167.4 MB in the beginning and 100.9 MB in the end (delta: 66.5 MB). Peak memory consumption was 140.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 332 SDslu, 1090 SDs, 0 SdLazy, 941 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, 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, 7 MinimizatonAttempts, 79 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 80 PreInvPairs, 138 NumberOfFragments, 443 HoareAnnotationTreeSize, 80 FomulaSimplifications, 12640 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...