/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/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:49:30,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:49:30,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:49:30,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 17:49:30,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:49:30,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:49:30,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:49:30,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:49:30,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:49:30,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:49:30,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:49:30,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:49:30,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:49:30,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:49:30,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:49:30,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:49:30,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:49:30,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:49:30,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:49:30,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:49:30,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:49:30,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:49:30,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:49:30,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:49:30,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:49:30,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:49:30,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:49:30,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:49:30,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:49:30,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:49:30,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:49:30,863 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:49:30,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:49:30,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:49:30,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:49:30,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:49:30,864 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:49:30,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:49:30,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:49:30,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:30,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:49:30,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:49:30,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:49:30,866 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:49:31,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:49:31,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:49:31,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:49:31,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:49:31,330 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:49:31,331 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-04 17:49:31,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dee0086c2/4b5a00eb0fb8417fa12ff6fb2788b397/FLAGab293bd55 [2020-09-04 17:49:32,004 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:49:32,005 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-04 17:49:32,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dee0086c2/4b5a00eb0fb8417fa12ff6fb2788b397/FLAGab293bd55 [2020-09-04 17:49:32,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dee0086c2/4b5a00eb0fb8417fa12ff6fb2788b397 [2020-09-04 17:49:32,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:49:32,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:49:32,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:32,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:49:32,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:49:32,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32, skipping insertion in model container [2020-09-04 17:49:32,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:49:32,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:49:32,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:32,653 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:49:32,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:32,694 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:49:32,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32 WrapperNode [2020-09-04 17:49:32,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:32,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:49:32,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:49:32,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:49:32,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... [2020-09-04 17:49:32,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:49:32,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:49:32,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:49:32,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:49:32,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:49:32,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:49:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:49:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:49:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:49:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:49:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:49:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:49:33,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:49:33,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:49:33,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:33 BoogieIcfgContainer [2020-09-04 17:49:33,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:49:33,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:49:33,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:49:33,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:49:33,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:49:32" (1/3) ... [2020-09-04 17:49:33,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9483cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:33, skipping insertion in model container [2020-09-04 17:49:33,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:32" (2/3) ... [2020-09-04 17:49:33,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9483cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:33, skipping insertion in model container [2020-09-04 17:49:33,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:33" (3/3) ... [2020-09-04 17:49:33,150 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-09-04 17:49:33,165 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:49:33,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:49:33,205 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:49:33,253 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:49:33,254 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:49:33,254 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:49:33,254 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:49:33,254 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:49:33,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:49:33,267 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:49:33,267 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:49:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-04 17:49:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 17:49:33,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:33,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:33,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-09-04 17:49:33,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:33,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778724597] [2020-09-04 17:49:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:33,401 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:33,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778724597] [2020-09-04 17:49:33,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:33,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 17:49:33,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743376168] [2020-09-04 17:49:33,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 17:49:33,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:33,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 17:49:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:49:33,520 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-04 17:49:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:33,554 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-09-04 17:49:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 17:49:33,556 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-04 17:49:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:33,571 INFO L225 Difference]: With dead ends: 42 [2020-09-04 17:49:33,571 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 17:49:33,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:49:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 17:49:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 17:49:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 17:49:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-04 17:49:33,634 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-09-04 17:49:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:33,634 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-04 17:49:33,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 17:49:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-04 17:49:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 17:49:33,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:33,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:33,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:49:33,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash 993822854, now seen corresponding path program 1 times [2020-09-04 17:49:33,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:33,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050632582] [2020-09-04 17:49:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:33,640 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:33,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050632582] [2020-09-04 17:49:33,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:33,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:49:33,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820071110] [2020-09-04 17:49:33,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:49:33,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:49:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:49:33,757 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-09-04 17:49:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:33,823 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-04 17:49:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:49:33,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 17:49:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:33,826 INFO L225 Difference]: With dead ends: 39 [2020-09-04 17:49:33,826 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 17:49:33,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 17:49:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-04 17:49:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 17:49:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-04 17:49:33,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-09-04 17:49:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:33,843 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-04 17:49:33,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:49:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-04 17:49:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 17:49:33,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:33,845 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:33,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:49:33,845 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1988212296, now seen corresponding path program 1 times [2020-09-04 17:49:33,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:33,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956788865] [2020-09-04 17:49:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:33,849 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 17:49:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:33,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956788865] [2020-09-04 17:49:33,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:33,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:49:33,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683417519] [2020-09-04 17:49:33,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:49:33,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:49:33,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:33,954 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-04 17:49:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:34,080 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-09-04 17:49:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:49:34,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-04 17:49:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:34,085 INFO L225 Difference]: With dead ends: 54 [2020-09-04 17:49:34,085 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 17:49:34,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:49:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 17:49:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-09-04 17:49:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 17:49:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 17:49:34,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-09-04 17:49:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:34,099 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 17:49:34,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:49:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 17:49:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:49:34,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:34,100 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] [2020-09-04 17:49:34,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:49:34,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-09-04 17:49:34,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:34,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340644380] [2020-09-04 17:49:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:34,122 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:34,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340644380] [2020-09-04 17:49:34,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:34,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:49:34,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754053143] [2020-09-04 17:49:34,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:49:34,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:49:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:49:34,189 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-09-04 17:49:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:34,300 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-09-04 17:49:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:49:34,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-04 17:49:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:34,302 INFO L225 Difference]: With dead ends: 41 [2020-09-04 17:49:34,302 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 17:49:34,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:49:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 17:49:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-09-04 17:49:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 17:49:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 17:49:34,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-04 17:49:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:34,313 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 17:49:34,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:49:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 17:49:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 17:49:34,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:34,315 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:34,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:49:34,316 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1883436929, now seen corresponding path program 1 times [2020-09-04 17:49:34,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:34,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509914033] [2020-09-04 17:49:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:34,839 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-09-04 17:49:34,893 INFO L273 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-09-04 17:49:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:34,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:49:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:35,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509914033] [2020-09-04 17:49:35,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:35,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:49:35,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752631120] [2020-09-04 17:49:35,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:49:35,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:35,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:49:35,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:49:35,140 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-09-04 17:49:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:35,230 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-04 17:49:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:49:35,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-04 17:49:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:35,232 INFO L225 Difference]: With dead ends: 39 [2020-09-04 17:49:35,232 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:49:35,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:49:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:49:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:49:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:49:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:49:35,234 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-09-04 17:49:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:35,234 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:49:35,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:49:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:49:35,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:49:35,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:49:35,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:49:35,607 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,608 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,608 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:35,609 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:35,609 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:35,609 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 17:49:35,609 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 17:49:35,609 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:35,609 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 26) the Hoare annotation is: true [2020-09-04 17:49:35,610 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (or (and (<= main_~n~0 0) (<= main_~x~0 0)) (and (<= 0 main_~m~0) (<= 0 main_~x~0))) [2020-09-04 17:49:35,610 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,610 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 0)) [2020-09-04 17:49:35,610 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,610 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0))) (or (and .cse0 (<= main_~n~0 0)) (and .cse0 (<= 0 main_~x~0)))) [2020-09-04 17:49:35,611 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 26) the Hoare annotation is: true [2020-09-04 17:49:35,611 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-04 17:49:35,611 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-09-04 17:49:35,611 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,612 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,612 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-09-04 17:49:35,612 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,612 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-09-04 17:49:35,613 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0) (<= main_~m~0 0) (<= main_~x~0 0)) [2020-09-04 17:49:35,613 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,613 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 20) the Hoare annotation is: (and (<= 0 main_~m~0) (<= 0 main_~x~0)) [2020-09-04 17:49:35,613 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 17:49:35,613 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (and (<= main_~m~0 0) (not (= __VERIFIER_assert_~cond 0)))) [2020-09-04 17:49:35,614 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: false [2020-09-04 17:49:35,614 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (and (<= main_~m~0 0) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2020-09-04 17:49:35,614 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (and (<= main_~m~0 0) (not (= __VERIFIER_assert_~cond 0)))) [2020-09-04 17:49:35,614 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: false [2020-09-04 17:49:35,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:49:35 BoogieIcfgContainer [2020-09-04 17:49:35,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:49:35,645 INFO L168 Benchmark]: Toolchain (without parser) took 3262.00 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 103.0 MB in the beginning and 140.6 MB in the end (delta: -37.6 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:35,647 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:49:35,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.22 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:35,649 INFO L168 Benchmark]: Boogie Preprocessor took 118.04 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 184.5 MB in the end (delta: -91.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:35,650 INFO L168 Benchmark]: RCFGBuilder took 323.72 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:35,651 INFO L168 Benchmark]: TraceAbstraction took 2502.30 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 170.2 MB in the beginning and 140.6 MB in the end (delta: 29.6 MB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:35,656 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.22 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.04 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 184.5 MB in the end (delta: -91.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 323.72 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2502.30 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 170.2 MB in the beginning and 140.6 MB in the end (delta: 29.6 MB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 <= m && 0 <= x - 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 || (m <= 0 && !(cond == 0)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 58 SDslu, 261 SDs, 0 SdLazy, 118 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 20 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 71 PreInvPairs, 110 NumberOfFragments, 174 HoareAnnotationTreeSize, 71 FomulaSimplifications, 320 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 29 FomulaSimplificationsInter, 132 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...