/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:35,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:35,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:35,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:35,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:35,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:35,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:35,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:35,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:35,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:35,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:35,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:35,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:35,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:35,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:35,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:35,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:35,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:35,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:35,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:35,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:35,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:35,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:35,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:35,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:35,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:35,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:35,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:35,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:43:35,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:35,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:35,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:35,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:35,873 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:35,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:35,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:35,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:35,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:35,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:35,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:35,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:35,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:35,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:35,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:35,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:35,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:35,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:35,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:35,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:35,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:35,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:35,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:35,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:35,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:35,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:35,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:35,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:35,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:35,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:36,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:36,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:36,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:36,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:36,394 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:36,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-09-04 13:43:36,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e17a1979f/5e3ad8b1ba544962ad9f775406243836/FLAG0a6bb958b [2020-09-04 13:43:37,040 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:37,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-09-04 13:43:37,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e17a1979f/5e3ad8b1ba544962ad9f775406243836/FLAG0a6bb958b [2020-09-04 13:43:37,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e17a1979f/5e3ad8b1ba544962ad9f775406243836 [2020-09-04 13:43:37,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:37,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:37,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:37,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:37,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:37,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82f562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37, skipping insertion in model container [2020-09-04 13:43:37,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:37,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:37,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:37,678 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:37,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:37,720 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:37,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37 WrapperNode [2020-09-04 13:43:37,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:37,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:37,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:37,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:37,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (1/1) ... [2020-09-04 13:43:37,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:37,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:37,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:37,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:37,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (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 13:43:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:43:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:43:37,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:43:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:43:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 13:43:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:38,164 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:38,165 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 13:43:38,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:38 BoogieIcfgContainer [2020-09-04 13:43:38,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:38,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:38,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:38,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:38,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:37" (1/3) ... [2020-09-04 13:43:38,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c90af15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:38, skipping insertion in model container [2020-09-04 13:43:38,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:37" (2/3) ... [2020-09-04 13:43:38,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c90af15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:38, skipping insertion in model container [2020-09-04 13:43:38,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:38" (3/3) ... [2020-09-04 13:43:38,181 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-09-04 13:43:38,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:38,205 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:43:38,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:43:38,277 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:38,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:38,279 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:38,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:38,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:38,280 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:38,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:38,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-04 13:43:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-04 13:43:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:38,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:38,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-09-04 13:43:38,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:38,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899697586] [2020-09-04 13:43:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:38,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:38,521 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 13:43:38,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899697586] [2020-09-04 13:43:38,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:38,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:43:38,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574067975] [2020-09-04 13:43:38,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:43:38,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:43:38,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:43:38,553 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-04 13:43:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:38,582 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-04 13:43:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:43:38,583 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-04 13:43:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:38,593 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:43:38,593 INFO L226 Difference]: Without dead ends: 13 [2020-09-04 13:43:38,597 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 13:43:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-04 13:43:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-04 13:43:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-04 13:43:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-04 13:43:38,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-09-04 13:43:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:38,642 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-04 13:43:38,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:43:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-04 13:43:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-04 13:43:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:38,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:38,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:43:38,645 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-09-04 13:43:38,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:38,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546318382] [2020-09-04 13:43:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:38,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:38,954 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 13:43:38,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546318382] [2020-09-04 13:43:38,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:38,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:43:38,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456942678] [2020-09-04 13:43:38,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:43:38,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:43:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:43:38,959 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-09-04 13:43:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:41,160 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-09-04 13:43:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:43:41,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-04 13:43:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:41,162 INFO L225 Difference]: With dead ends: 20 [2020-09-04 13:43:41,162 INFO L226 Difference]: Without dead ends: 15 [2020-09-04 13:43:41,164 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 [2020-09-04 13:43:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-04 13:43:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-04 13:43:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-04 13:43:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-09-04 13:43:41,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-09-04 13:43:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:41,171 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-09-04 13:43:41,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:43:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-09-04 13:43:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:41,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:41,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:41,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:43:41,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1596010865, now seen corresponding path program 1 times [2020-09-04 13:43:41,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:41,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933441220] [2020-09-04 13:43:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:41,182 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:41,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132547459] [2020-09-04 13:43:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 13:43:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:41,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-09-04 13:43:41,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933441220] [2020-09-04 13:43:41,466 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:41,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132547459] [2020-09-04 13:43:41,466 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-09-04 13:43:41,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:41,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-09-04 13:43:41,467 ERROR L206 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-09-04 13:43:41,467 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:43:41,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:43:41,704 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-04 13:43:41,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:41 BoogieIcfgContainer [2020-09-04 13:43:41,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:41,708 INFO L168 Benchmark]: Toolchain (without parser) took 4297.49 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 102.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:41,709 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:43:41,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.86 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:41,711 INFO L168 Benchmark]: Boogie Preprocessor took 132.36 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 179.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:41,712 INFO L168 Benchmark]: RCFGBuilder took 315.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 166.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:41,713 INFO L168 Benchmark]: TraceAbstraction took 3533.19 ms. Allocated memory is still 200.8 MB. Free memory was 166.1 MB in the beginning and 102.9 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:41,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.86 ms. Allocated memory is still 137.9 MB. Free memory was 101.2 MB in the beginning and 91.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.36 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 179.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.73 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 166.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3533.19 ms. Allocated memory is still 200.8 MB. Free memory was 166.1 MB in the beginning and 102.9 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 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, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 6 SDslu, 30 SDs, 0 SdLazy, 30 SolverSat, 2 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s 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=19occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 940 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...