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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:27,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:27,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:27,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:27,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:27,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:27,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:27,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:27,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:27,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:27,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:27,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:27,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:27,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:27,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:27,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:27,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:27,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:27,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:27,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:27,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:27,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:27,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:27,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:27,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:27,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:27,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:27,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:27,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:27,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:27,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:27,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:27,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:27,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:27,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:27,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:27,974 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 [2019-10-14 23:15:27,988 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:27,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:27,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:27,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:27,990 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:27,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:27,990 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:27,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:27,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:27,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:27,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:27,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:27,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:27,991 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:27,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:27,992 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:27,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:27,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:27,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:27,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:27,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:27,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:27,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:27,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:27,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:27,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:27,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:27,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:27,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:28,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:28,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:28,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:28,302 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:28,303 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:28,304 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2019-10-14 23:15:28,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01b8e102c/21a0608ee17c44f89eef6ac957037f20/FLAG171401526 [2019-10-14 23:15:28,816 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:28,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2019-10-14 23:15:28,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01b8e102c/21a0608ee17c44f89eef6ac957037f20/FLAG171401526 [2019-10-14 23:15:29,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01b8e102c/21a0608ee17c44f89eef6ac957037f20 [2019-10-14 23:15:29,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:29,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:29,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:29,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:29,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:29,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a11b6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29, skipping insertion in model container [2019-10-14 23:15:29,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,249 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:29,271 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:29,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:29,486 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:29,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:29,528 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29 WrapperNode [2019-10-14 23:15:29,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:29,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:29,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:29,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:29,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (1/1) ... [2019-10-14 23:15:29,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:29,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:29,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:29,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:29,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (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 [2019-10-14 23:15:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:29,924 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:29,925 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:15:29,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:29 BoogieIcfgContainer [2019-10-14 23:15:29,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:29,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:29,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:29,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:29,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:29" (1/3) ... [2019-10-14 23:15:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26113254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:29, skipping insertion in model container [2019-10-14 23:15:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:29" (2/3) ... [2019-10-14 23:15:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26113254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:29, skipping insertion in model container [2019-10-14 23:15:29,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:29" (3/3) ... [2019-10-14 23:15:29,940 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2019-10-14 23:15:29,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:29,973 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:29,986 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:30,017 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:30,018 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:30,018 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:30,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:30,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:30,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:30,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:30,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 23:15:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:15:30,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:30,049 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:30,051 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -810471198, now seen corresponding path program 1 times [2019-10-14 23:15:30,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:30,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408902967] [2019-10-14 23:15:30,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:30,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:30,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:30,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408902967] [2019-10-14 23:15:30,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:30,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 23:15:30,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339550720] [2019-10-14 23:15:30,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:15:30,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:15:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:30,415 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 9 states. [2019-10-14 23:15:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:30,876 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2019-10-14 23:15:30,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:30,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-14 23:15:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:30,887 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:15:30,888 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:15:30,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:15:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:15:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:15:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 23:15:30,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2019-10-14 23:15:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:30,941 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 23:15:30,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:15:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 23:15:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:15:30,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:30,943 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:30,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1809643041, now seen corresponding path program 1 times [2019-10-14 23:15:30,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:30,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555232579] [2019-10-14 23:15:30,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:30,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:30,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:31,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555232579] [2019-10-14 23:15:31,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856802298] [2019-10-14 23:15:31,089 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 [2019-10-14 23:15:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:15:31,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:31,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:31,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:31,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2019-10-14 23:15:31,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921692786] [2019-10-14 23:15:31,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:15:31,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:15:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:31,278 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-10-14 23:15:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:31,363 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-10-14 23:15:31,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:15:31,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-10-14 23:15:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:31,365 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:15:31,365 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:15:31,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:15:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-10-14 23:15:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:15:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-10-14 23:15:31,376 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 21 [2019-10-14 23:15:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:31,377 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-10-14 23:15:31,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:15:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-10-14 23:15:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:15:31,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:31,378 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:31,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:31,583 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2040308290, now seen corresponding path program 1 times [2019-10-14 23:15:31,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:31,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080912335] [2019-10-14 23:15:31,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:31,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:31,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:31,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080912335] [2019-10-14 23:15:31,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45806034] [2019-10-14 23:15:31,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:15:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:31,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:15:31,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:31,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:31,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-10-14 23:15:31,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808407603] [2019-10-14 23:15:31,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:31,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:31,930 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 16 states. [2019-10-14 23:15:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:32,755 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2019-10-14 23:15:32,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:15:32,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-10-14 23:15:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:32,760 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:15:32,760 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 23:15:32,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:15:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 23:15:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2019-10-14 23:15:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:15:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-10-14 23:15:32,782 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 28 [2019-10-14 23:15:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:32,782 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-10-14 23:15:32,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-10-14 23:15:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:15:32,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:32,785 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:32,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:32,989 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -612204525, now seen corresponding path program 1 times [2019-10-14 23:15:32,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:32,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118453041] [2019-10-14 23:15:32,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:32,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:32,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:15:33,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118453041] [2019-10-14 23:15:33,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553675357] [2019-10-14 23:15:33,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:15:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:15:33,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:15:33,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:33,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 19 [2019-10-14 23:15:33,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598225608] [2019-10-14 23:15:33,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:33,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:33,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:15:33,355 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 6 states. [2019-10-14 23:15:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:33,459 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-10-14 23:15:33,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:33,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-10-14 23:15:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:33,461 INFO L225 Difference]: With dead ends: 99 [2019-10-14 23:15:33,461 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:15:33,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:15:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-10-14 23:15:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:15:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-14 23:15:33,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 37 [2019-10-14 23:15:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:33,478 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-14 23:15:33,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-14 23:15:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:15:33,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:33,480 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:33,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:33,687 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1320897281, now seen corresponding path program 2 times [2019-10-14 23:15:33,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:33,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327393661] [2019-10-14 23:15:33,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:33,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:33,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:15:33,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327393661] [2019-10-14 23:15:33,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138900699] [2019-10-14 23:15:33,843 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:33,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:15:33,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:33,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:15:33,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:33,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 23:15:34,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:34,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-10-14 23:15:34,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771368258] [2019-10-14 23:15:34,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:15:34,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:15:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:34,017 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 17 states. [2019-10-14 23:15:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:34,856 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2019-10-14 23:15:34,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:15:34,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-10-14 23:15:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:34,863 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:15:34,863 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:15:34,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=1287, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:15:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:15:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:15:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:15:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:15:34,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2019-10-14 23:15:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:34,866 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:15:34,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:15:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:15:34,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:15:35,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:35,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:15:35,305 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2019-10-14 23:15:35,570 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2019-10-14 23:15:35,573 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:15:35,573 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) [2019-10-14 23:15:35,573 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:35,573 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:35,573 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:15:35,574 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:15:35,574 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:15:35,574 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 26) no Hoare annotation was computed. [2019-10-14 23:15:35,574 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse6 (* 3 main_~i~0))) (let ((.cse2 (<= 2 main_~i~0)) (.cse3 (< main_~j~0 .cse6)) (.cse4 (* 2 main_~n~0)) (.cse0 (< main_~i~0 main_~n~0)) (.cse1 (<= (* 2 main_~i~0) main_~j~0)) (.cse5 (<= (+ main_~k~0 2) .cse6))) (or (and (<= (div (- main_~j~0) (- 2)) main_~k~0) (<= 1 main_~i~0) .cse0 .cse1 (<= main_~k~0 main_~i~0)) (and .cse2 .cse3 (<= (+ (* 2 main_~j~0) 2) (+ main_~i~0 main_~k~0 .cse4)) .cse0 .cse1 .cse5) (and .cse2 .cse3 (<= (+ .cse6 5) (+ main_~j~0 .cse4)) .cse0 .cse1 .cse5)))) [2019-10-14 23:15:35,574 INFO L443 ceAbstractionStarter]: For program point L23-1(lines 22 23) no Hoare annotation was computed. [2019-10-14 23:15:35,574 INFO L443 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-10-14 23:15:35,575 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-10-14 23:15:35,575 INFO L446 ceAbstractionStarter]: At program point L24(lines 11 26) the Hoare annotation is: true [2019-10-14 23:15:35,575 INFO L443 ceAbstractionStarter]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2019-10-14 23:15:35,575 INFO L439 ceAbstractionStarter]: At program point L20-3(lines 20 23) the Hoare annotation is: (or (and (<= 1 main_~i~0) (<= main_~i~0 main_~n~0)) (and (<= 0 main_~i~0) (<= main_~i~0 0))) [2019-10-14 23:15:35,575 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-10-14 23:15:35,575 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2019-10-14 23:15:35,575 INFO L439 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (or (and (<= 0 main_~i~0) (<= (+ .cse0 1) main_~n~0) (<= main_~i~0 0)) (and (<= 1 main_~i~0) (<= .cse0 main_~j~0) (< main_~i~0 main_~n~0)))) [2019-10-14 23:15:35,575 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-10-14 23:15:35,576 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 26) no Hoare annotation was computed. [2019-10-14 23:15:35,576 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 26) the Hoare annotation is: true [2019-10-14 23:15:35,576 INFO L439 ceAbstractionStarter]: At program point L22-2(lines 22 23) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0)) (.cse6 (div (- main_~j~0) (- 2))) (.cse3 (* 3 main_~i~0))) (let ((.cse0 (< main_~j~0 .cse3)) (.cse1 (<= .cse6 main_~k~0)) (.cse4 (< main_~i~0 main_~n~0)) (.cse5 (<= .cse2 main_~j~0))) (or (and .cse0 (<= 0 main_~i~0) .cse1 (<= (+ .cse2 1) main_~n~0) (<= main_~i~0 0)) (and (<= 2 main_~i~0) .cse0 (<= (+ .cse3 5) (+ main_~j~0 (* 2 main_~n~0))) .cse4 .cse5) (and (<= 1 main_~i~0) .cse4 .cse5 (<= main_~j~0 .cse2) (<= (+ .cse6 1) main_~k~0)) (and .cse1 .cse4 .cse5 (<= main_~k~0 main_~i~0) (<= (+ main_~k~0 2) .cse3))))) [2019-10-14 23:15:35,576 INFO L443 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-10-14 23:15:35,576 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:15:35,576 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:15:35,576 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:35,577 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:15:35,577 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:15:35,577 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:35,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:15:35 BoogieIcfgContainer [2019-10-14 23:15:35,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:15:35,594 INFO L168 Benchmark]: Toolchain (without parser) took 6362.94 ms. Allocated memory was 136.8 MB in the beginning and 280.5 MB in the end (delta: 143.7 MB). Free memory was 100.3 MB in the beginning and 173.1 MB in the end (delta: -72.8 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,595 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.27 ms. Allocated memory is still 136.8 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,597 INFO L168 Benchmark]: Boogie Preprocessor took 115.90 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.4 MB in the beginning and 178.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,598 INFO L168 Benchmark]: RCFGBuilder took 280.60 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 164.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,599 INFO L168 Benchmark]: TraceAbstraction took 5664.80 ms. Allocated memory was 199.8 MB in the beginning and 280.5 MB in the end (delta: 80.7 MB). Free memory was 163.7 MB in the beginning and 173.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:35,604 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.27 ms. Allocated memory is still 136.8 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.90 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.4 MB in the beginning and 178.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.60 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 164.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5664.80 ms. Allocated memory was 199.8 MB in the beginning and 280.5 MB in the end (delta: 80.7 MB). Free memory was 163.7 MB in the beginning and 173.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * 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: 20]: Loop Invariant Derived loop invariant: (1 <= i && i <= n) || (0 <= i && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((0 <= i && 2 * i + 1 <= n) && i <= 0) || ((1 <= i && 2 * i <= j) && i < n) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((j < 3 * i && 0 <= i) && -j / -2 <= k) && 2 * i + 1 <= n) && i <= 0) || ((((2 <= i && j < 3 * i) && 3 * i + 5 <= j + 2 * n) && i < n) && 2 * i <= j)) || ((((1 <= i && i < n) && 2 * i <= j) && j <= 2 * i) && -j / -2 + 1 <= k)) || ((((-j / -2 <= k && i < n) && 2 * i <= j) && k <= i) && k + 2 <= 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Result: SAFE, OverallTime: 5.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 103 SDtfs, 269 SDslu, 271 SDs, 0 SdLazy, 853 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 261 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 30 PreInvPairs, 59 NumberOfFragments, 247 HoareAnnotationTreeSize, 30 FomulaSimplifications, 1037 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 421 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 292 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 283 ConstructedInterpolants, 0 QuantifiedInterpolants, 32012 SizeOfPredicates, 11 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 121/178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...