/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-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:25,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:25,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:25,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:25,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:25,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:25,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:25,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:25,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:25,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:25,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:25,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:25,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:25,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:25,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:25,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:25,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:25,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:25,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:25,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:25,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:25,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:25,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:25,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:25,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:25,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:25,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:25,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:25,417 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 19:46:25,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:25,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:25,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:25,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:25,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:25,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:25,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:25,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:25,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:25,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:25,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:25,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:25,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:25,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:25,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:25,430 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:25,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:25,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:25,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:25,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:25,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:25,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:25,432 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:25,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:25,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:25,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:25,745 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:25,745 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:25,746 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-22 19:46:25,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87743d3db/55fd6f91763e4a149cc9c736d52b7ddc/FLAG5c0ffdc96 [2020-08-22 19:46:26,263 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:26,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-22 19:46:26,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87743d3db/55fd6f91763e4a149cc9c736d52b7ddc/FLAG5c0ffdc96 [2020-08-22 19:46:26,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87743d3db/55fd6f91763e4a149cc9c736d52b7ddc [2020-08-22 19:46:26,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:26,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:26,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:26,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:26,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:26,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:26,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547fd1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26, skipping insertion in model container [2020-08-22 19:46:26,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:26,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:26,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:26,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:26,886 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:26,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:26,915 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:26,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26 WrapperNode [2020-08-22 19:46:26,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:26,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:26,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:26,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:26,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:26,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (1/1) ... [2020-08-22 19:46:27,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:27,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:27,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:27,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:27,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (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 19:46:27,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:27,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:27,089 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:46:27,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:27,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:27,321 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:27,321 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:46:27,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:27 BoogieIcfgContainer [2020-08-22 19:46:27,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:27,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:27,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:27,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:27,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:26" (1/3) ... [2020-08-22 19:46:27,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a152cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:27, skipping insertion in model container [2020-08-22 19:46:27,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:26" (2/3) ... [2020-08-22 19:46:27,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a152cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:27, skipping insertion in model container [2020-08-22 19:46:27,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:27" (3/3) ... [2020-08-22 19:46:27,348 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-08-22 19:46:27,383 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:27,392 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:27,409 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:27,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:27,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:27,432 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:27,433 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:27,433 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:27,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:27,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:27,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 19:46:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 19:46:27,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:27,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:27,457 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 31250732, now seen corresponding path program 1 times [2020-08-22 19:46:27,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:27,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515772192] [2020-08-22 19:46:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:27,528 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:27,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:27,591 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 19:46:27,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515772192] [2020-08-22 19:46:27,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:27,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:46:27,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587566863] [2020-08-22 19:46:27,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:46:27,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:46:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:46:27,615 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-08-22 19:46:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:27,642 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-22 19:46:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:46:27,643 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-08-22 19:46:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:27,652 INFO L225 Difference]: With dead ends: 37 [2020-08-22 19:46:27,652 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 19:46:27,656 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 [2020-08-22 19:46:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 19:46:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 19:46:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 19:46:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-22 19:46:27,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-08-22 19:46:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:27,697 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-22 19:46:27,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:46:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-22 19:46:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 19:46:27,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:27,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:27,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:27,699 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 18321438, now seen corresponding path program 1 times [2020-08-22 19:46:27,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:27,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461108863] [2020-08-22 19:46:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:27,703 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:28,008 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 19:46:28,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461108863] [2020-08-22 19:46:28,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:28,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:46:28,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618442787] [2020-08-22 19:46:28,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:46:28,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:28,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:46:28,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:28,013 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2020-08-22 19:46:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:28,984 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-08-22 19:46:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:28,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 19:46:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:28,987 INFO L225 Difference]: With dead ends: 29 [2020-08-22 19:46:28,988 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:46:28,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:46:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-08-22 19:46:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:46:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-08-22 19:46:29,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-08-22 19:46:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:29,004 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-08-22 19:46:29,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:46:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-08-22 19:46:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 19:46:29,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:29,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:29,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:29,006 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:29,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1887897215, now seen corresponding path program 1 times [2020-08-22 19:46:29,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:29,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902854608] [2020-08-22 19:46:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:29,032 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:29,039 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 19:46:29,039 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:46:29,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:29,060 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 19:46:29,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:46:29 BoogieIcfgContainer [2020-08-22 19:46:29,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:46:29,064 INFO L168 Benchmark]: Toolchain (without parser) took 2409.51 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.7 MB in the beginning and 114.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:29,065 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 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 19:46:29,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.47 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:29,067 INFO L168 Benchmark]: Boogie Preprocessor took 112.14 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:29,068 INFO L168 Benchmark]: RCFGBuilder took 298.34 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 169.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:29,069 INFO L168 Benchmark]: TraceAbstraction took 1721.96 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 114.3 MB in the end (delta: 54.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:29,072 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 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 260.47 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.14 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.4 MB in the beginning and 182.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 298.34 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 169.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1721.96 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 114.3 MB in the end (delta: 54.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] unsigned int x = 1; [L17] unsigned int y = __VERIFIER_nondet_uint(); [L19] COND FALSE !(!(y > 0)) [L21] COND TRUE x < y [L22] COND FALSE !(x < y / x) [L25] x++ [L21] COND FALSE !(x < y) [L29] CALL __VERIFIER_assert(x == y) [L9] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 12 SDslu, 41 SDs, 0 SdLazy, 47 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...