/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/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:16:11,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:16:11,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:16:11,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:16:11,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:16:11,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:16:11,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:16:11,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:16:11,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:16:11,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:16:11,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:16:11,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:16:11,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:16:11,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:16:11,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:16:11,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:16:11,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:16:11,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:16:11,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:16:11,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:16:11,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:16:11,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:16:11,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:16:11,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:16:11,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:16:11,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:16:11,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:16:11,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:16:11,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:16:11,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:16:11,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:16:11,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:16:11,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:16:11,545 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:16:11,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:16:11,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:16:11,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:16:11,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:16:11,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:16:11,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:16:11,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:16:11,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:16:11,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:16:11,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:16:11,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:16:11,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:16:11,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:16:11,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:16:11,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:16:11,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:16:11,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:16:11,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:16:11,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:16:11,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:16:11,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:16:11,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:16:11,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:16:11,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:16:11,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:16:11,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:16:12,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:16:12,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:16:12,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:16:12,031 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:16:12,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-17 12:16:12,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2844dcc61/2392aa15a96e43a39e9a94d09950746c/FLAG9f2dcc893 [2020-07-17 12:16:12,644 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:12,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-17 12:16:12,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2844dcc61/2392aa15a96e43a39e9a94d09950746c/FLAG9f2dcc893 [2020-07-17 12:16:12,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2844dcc61/2392aa15a96e43a39e9a94d09950746c [2020-07-17 12:16:12,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:12,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:12,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:12,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:12,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:12,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:12" (1/1) ... [2020-07-17 12:16:13,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d51c9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:12, skipping insertion in model container [2020-07-17 12:16:13,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:12" (1/1) ... [2020-07-17 12:16:13,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:13,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:13,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:13,359 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:13,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:13,410 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:13,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13 WrapperNode [2020-07-17 12:16:13,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:13,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:13,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:13,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:13,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (1/1) ... [2020-07-17 12:16:13,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:13,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:13,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:13,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:13,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (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 [2020-07-17 12:16:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 12:16:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:16:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:16:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:16:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:13,864 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:13,865 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:16:13,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:13 BoogieIcfgContainer [2020-07-17 12:16:13,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:13,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:13,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:13,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:13,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:12" (1/3) ... [2020-07-17 12:16:13,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2b1315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:13, skipping insertion in model container [2020-07-17 12:16:13,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:13" (2/3) ... [2020-07-17 12:16:13,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2b1315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:13, skipping insertion in model container [2020-07-17 12:16:13,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:13" (3/3) ... [2020-07-17 12:16:13,881 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-07-17 12:16:13,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:13,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:13,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:13,951 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:13,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:13,952 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:13,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:13,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:13,953 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:13,953 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:13,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-17 12:16:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 12:16:13,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:13,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:13,986 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-07-17 12:16:14,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:14,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738110611] [2020-07-17 12:16:14,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:14,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738110611] [2020-07-17 12:16:14,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:14,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:16:14,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827025364] [2020-07-17 12:16:14,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:16:14,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:16:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:14,290 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-07-17 12:16:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:14,401 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-17 12:16:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:16:14,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-17 12:16:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:14,414 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:16:14,414 INFO L226 Difference]: Without dead ends: 14 [2020-07-17 12:16:14,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-17 12:16:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-17 12:16:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-17 12:16:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-17 12:16:14,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-17 12:16:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:14,465 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-17 12:16:14,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:16:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-17 12:16:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 12:16:14,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:14,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:14,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:14,468 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-07-17 12:16:14,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:14,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578285025] [2020-07-17 12:16:14,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:14,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578285025] [2020-07-17 12:16:14,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:14,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:16:14,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10354794] [2020-07-17 12:16:14,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:16:14,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:16:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:16:14,576 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-07-17 12:16:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:14,645 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-17 12:16:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:16:14,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-17 12:16:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:14,647 INFO L225 Difference]: With dead ends: 22 [2020-07-17 12:16:14,647 INFO L226 Difference]: Without dead ends: 16 [2020-07-17 12:16:14,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:16:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-17 12:16:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-17 12:16:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-17 12:16:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-17 12:16:14,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-17 12:16:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:14,660 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-17 12:16:14,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:16:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-17 12:16:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 12:16:14,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:14,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:14,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:14,663 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-07-17 12:16:14,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:14,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967952635] [2020-07-17 12:16:14,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:14,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967952635] [2020-07-17 12:16:14,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210920832] [2020-07-17 12:16:14,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 12:16:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:14,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:16:14,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:14,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:14,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-17 12:16:14,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432691381] [2020-07-17 12:16:14,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:16:14,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:16:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:14,894 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-07-17 12:16:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:14,955 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-07-17 12:16:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:16:14,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-17 12:16:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:14,957 INFO L225 Difference]: With dead ends: 24 [2020-07-17 12:16:14,957 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 12:16:14,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:16:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 12:16:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-17 12:16:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-17 12:16:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-17 12:16:14,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-17 12:16:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-17 12:16:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:16:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-17 12:16:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:16:14,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:14,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:15,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:16:15,183 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-07-17 12:16:15,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:15,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108538329] [2020-07-17 12:16:15,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:15,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108538329] [2020-07-17 12:16:15,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915032487] [2020-07-17 12:16:15,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:15,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:15,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:15,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:16:15,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:15,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:15,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-17 12:16:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575760702] [2020-07-17 12:16:15,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:16:15,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:16:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:15,350 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-07-17 12:16:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:15,406 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-07-17 12:16:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:15,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-07-17 12:16:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:15,407 INFO L225 Difference]: With dead ends: 26 [2020-07-17 12:16:15,408 INFO L226 Difference]: Without dead ends: 20 [2020-07-17 12:16:15,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-17 12:16:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-17 12:16:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 12:16:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-17 12:16:15,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-17 12:16:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:15,417 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-17 12:16:15,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:16:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-17 12:16:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 12:16:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:15,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:15,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:15,635 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-07-17 12:16:15,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:15,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045716444] [2020-07-17 12:16:15,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:15,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045716444] [2020-07-17 12:16:15,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529535689] [2020-07-17 12:16:15,744 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:15,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-17 12:16:15,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:15,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-17 12:16:15,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:15,851 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-07-17 12:16:15,853 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:16:15,861 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:16:15,862 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:16:15,863 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-17 12:16:16,026 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:16:16,027 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2020-07-17 12:16:16,032 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-17 12:16:16,067 INFO L624 ElimStorePlain]: treesize reduction 11, result has 47.6 percent of original size [2020-07-17 12:16:16,069 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:16:16,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:7 [2020-07-17 12:16:16,099 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:16:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:16:16,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:16:16,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2020-07-17 12:16:16,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665383653] [2020-07-17 12:16:16,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:16:16,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:16:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:16:16,165 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-17 12:16:18,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:18,424 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-17 12:16:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:16:18,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-17 12:16:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:18,425 INFO L225 Difference]: With dead ends: 19 [2020-07-17 12:16:18,425 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:16:18,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:16:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:16:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:16:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:16:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:16:18,431 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-17 12:16:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:18,432 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:16:18,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:16:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:16:18,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:16:18,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:18,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:16:18,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:18,732 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-17 12:16:18,732 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:18,732 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:18,732 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:16:18,732 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:16:18,732 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:18,733 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 19) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-17 12:16:18,733 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2020-07-17 12:16:18,733 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (exists ((v_main_~i~0_10 Int)) (and (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))) (<= 1023 v_main_~i~0_10))) (exists ((v_main_~i~0_10 Int)) (and (<= main_~i~0 (+ v_main_~i~0_10 1)) (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (< |main_#t~mem1| 1024) (<= 1023 |main_#t~mem1|)) [2020-07-17 12:16:18,733 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-17 12:16:18,734 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2020-07-17 12:16:18,734 INFO L268 CegarLoopResult]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2020-07-17 12:16:18,734 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 16) the Hoare annotation is: (or (exists ((v_main_~i~0_10 Int)) (and (<= main_~i~0 (+ v_main_~i~0_10 1)) (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (= 0 main_~i~0)) [2020-07-17 12:16:18,734 INFO L268 CegarLoopResult]: For program point L14-4(lines 14 16) no Hoare annotation was computed. [2020-07-17 12:16:18,734 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-17 12:16:18,735 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:16:18,735 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-17 12:16:18,735 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-17 12:16:18,735 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-17 12:16:18,735 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:16:18,747 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,748 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,748 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,749 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,751 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-17 12:16:18,758 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,759 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-17 12:16:18,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:18 BoogieIcfgContainer [2020-07-17 12:16:18,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:18,768 INFO L168 Benchmark]: Toolchain (without parser) took 5784.30 ms. Allocated memory was 138.9 MB in the beginning and 236.5 MB in the end (delta: 97.5 MB). Free memory was 104.1 MB in the beginning and 153.4 MB in the end (delta: -49.3 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,770 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 420.16 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,774 INFO L168 Benchmark]: Boogie Preprocessor took 152.85 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.1 MB in the beginning and 180.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,775 INFO L168 Benchmark]: RCFGBuilder took 306.04 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,778 INFO L168 Benchmark]: TraceAbstraction took 4890.20 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 166.9 MB in the beginning and 153.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:18,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 420.16 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.85 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.1 MB in the beginning and 180.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.04 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 167.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4890.20 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 166.9 MB in the beginning and 153.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant [2020-07-17 12:16:18,807 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,808 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,808 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,809 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,809 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-17 12:16:18,811 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,812 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,812 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,812 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2020-07-17 12:16:18,813 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (\exists v_main_~i~0_10 : int :: (i <= v_main_~i~0_10 + 1 && v_main_~i~0_10 < 1024) && v_main_~i~0_10 == unknown-#memory_int-unknown[A][v_main_~i~0_10 * 4 + A]) || 0 == i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 24 SDslu, 67 SDs, 0 SdLazy, 103 SolverSat, 12 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 88 HoareAnnotationTreeSize, 11 FomulaSimplifications, 50 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 120 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 112 ConstructedInterpolants, 2 QuantifiedInterpolants, 3981 SizeOfPredicates, 8 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 9/28 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 proved your program to be correct! Received shutdown request...