/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-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:48:23,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:48:23,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:48:23,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:48:23,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:48:23,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:48:23,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:48:23,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:48:23,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:48:23,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:48:23,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:48:23,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:48:23,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:48:23,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:48:23,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:48:23,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:48:23,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:48:23,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:48:23,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:48:23,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:48:23,144 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 19:48:23,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:48:23,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:48:23,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:48:23,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:48:23,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:48:23,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:48:23,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:48:23,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:48:23,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:48:23,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:48:23,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:48:23,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:48:23,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:48:23,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:48:23,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:48:23,159 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:48:23,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:48:23,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:48:23,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:48:23,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:48:23,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:48:23,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:48:23,160 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:48:23,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:48:23,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:48:23,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:48:23,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:48:23,552 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:48:23,553 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-08-22 19:48:23,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8353416/18ba00466cf84a7fb39ca2d55d4d0ff3/FLAGfca2b3fbe [2020-08-22 19:48:24,103 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:48:24,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2020-08-22 19:48:24,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8353416/18ba00466cf84a7fb39ca2d55d4d0ff3/FLAGfca2b3fbe [2020-08-22 19:48:24,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8353416/18ba00466cf84a7fb39ca2d55d4d0ff3 [2020-08-22 19:48:24,458 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:48:24,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:48:24,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:24,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:48:24,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:48:24,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c91c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24, skipping insertion in model container [2020-08-22 19:48:24,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:48:24,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:48:24,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:24,698 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:48:24,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:48:24,724 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:48:24,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24 WrapperNode [2020-08-22 19:48:24,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:48:24,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:48:24,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:48:24,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:48:24,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (1/1) ... [2020-08-22 19:48:24,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:48:24,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:48:24,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:48:24,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:48:24,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (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 19:48:24,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:48:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:48:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:48:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:48:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:48:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:48:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:48:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:48:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:48:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:48:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:48:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:48:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:48:25,082 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:48:25,082 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:48:25,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:25 BoogieIcfgContainer [2020-08-22 19:48:25,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:48:25,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:48:25,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:48:25,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:48:25,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:48:24" (1/3) ... [2020-08-22 19:48:25,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346e420e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:25, skipping insertion in model container [2020-08-22 19:48:25,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:48:24" (2/3) ... [2020-08-22 19:48:25,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346e420e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:48:25, skipping insertion in model container [2020-08-22 19:48:25,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:48:25" (3/3) ... [2020-08-22 19:48:25,096 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-08-22 19:48:25,107 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:48:25,115 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:48:25,130 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:48:25,153 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:48:25,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:48:25,154 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:48:25,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:48:25,154 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:48:25,154 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:48:25,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:48:25,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:48:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 19:48:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 19:48:25,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:25,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:25,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 574813456, now seen corresponding path program 1 times [2020-08-22 19:48:25,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:25,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343946256] [2020-08-22 19:48:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:25,253 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:25,343 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 19:48:25,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343946256] [2020-08-22 19:48:25,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:25,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:48:25,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905610048] [2020-08-22 19:48:25,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:48:25,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:48:25,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:48:25,373 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-08-22 19:48:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:25,583 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-22 19:48:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:48:25,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-22 19:48:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:25,597 INFO L225 Difference]: With dead ends: 37 [2020-08-22 19:48:25,598 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 19:48:25,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:48:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 19:48:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-08-22 19:48:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 19:48:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-22 19:48:25,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-08-22 19:48:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:25,653 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-22 19:48:25,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:48:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-22 19:48:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:48:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:25,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:25,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:48:25,659 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:25,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1625616653, now seen corresponding path program 1 times [2020-08-22 19:48:25,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:25,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710467153] [2020-08-22 19:48:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:27,832 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:48:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:27,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:27,949 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 19:48:28,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710467153] [2020-08-22 19:48:28,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:28,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:48:28,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173862539] [2020-08-22 19:48:28,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:48:28,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:48:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:48:28,045 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-08-22 19:48:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:28,105 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-22 19:48:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:48:28,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-08-22 19:48:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:28,106 INFO L225 Difference]: With dead ends: 16 [2020-08-22 19:48:28,106 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:48:28,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:48:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:48:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:48:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:48:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:48:28,110 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-22 19:48:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:28,110 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:48:28,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:48:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:48:28,110 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:48:28,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:48:28,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:48:28,202 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,202 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,202 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,202 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,203 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,203 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:48:28,203 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:28,203 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:28,204 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:48:28,204 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:48:28,204 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:48:28,204 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 18) the Hoare annotation is: true [2020-08-22 19:48:28,204 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 18) the Hoare annotation is: true [2020-08-22 19:48:28,205 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 19:48:28,205 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 19:48:28,205 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 18) the Hoare annotation is: true [2020-08-22 19:48:28,205 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (< main_~i~0 1000000) [2020-08-22 19:48:28,206 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (and (< main_~i~0 1000000) (= |main_#t~post0| main_~i~0)) [2020-08-22 19:48:28,206 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (and (< |main_#t~post0| 1000000) (= main_~i~0 (+ |main_#t~post0| 1))) [2020-08-22 19:48:28,206 INFO L264 CegarLoopResult]: At program point L15-6(line 15) the Hoare annotation is: (<= main_~i~0 1000000) [2020-08-22 19:48:28,206 INFO L264 CegarLoopResult]: At program point L15-7(line 15) the Hoare annotation is: (= main_~i~0 1000000) [2020-08-22 19:48:28,207 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:28,207 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:28,207 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:28,207 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 19:48:28,208 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-08-22 19:48:28,208 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:48:28,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:48:28 BoogieIcfgContainer [2020-08-22 19:48:28,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:48:28,232 INFO L168 Benchmark]: Toolchain (without parser) took 3771.31 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 102.0 MB in the beginning and 104.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,233 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.72 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,236 INFO L168 Benchmark]: Boogie Preprocessor took 109.88 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 92.6 MB in the beginning and 178.4 MB in the end (delta: -85.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,237 INFO L168 Benchmark]: RCFGBuilder took 251.29 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 166.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,238 INFO L168 Benchmark]: TraceAbstraction took 3141.16 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 104.2 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:48:28,242 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.72 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.88 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 92.6 MB in the beginning and 178.4 MB in the end (delta: -85.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 251.29 ms. Allocated memory is still 199.2 MB. Free memory was 178.4 MB in the beginning and 166.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3141.16 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 104.2 MB in the end (delta: 61.1 MB). Peak memory consumption was 61.1 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: 15]: Loop Invariant Derived loop invariant: i <= 1000000 - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 7 SDslu, 48 SDs, 0 SdLazy, 39 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 28 PreInvPairs, 37 NumberOfFragments, 53 HoareAnnotationTreeSize, 28 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 13 FormulaSimplificationTreeSizeReductionInter, 0.0s 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...