/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-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:16:44,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:16:44,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:16:44,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:16:44,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:16:44,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:16:44,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:16:44,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:16:44,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:16:44,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:16:44,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:16:44,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:16:44,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:16:44,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:16:44,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:16:44,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:16:44,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:16:44,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:16:44,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:16:44,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:16:44,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:16:44,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:16:44,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:16:44,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:16:44,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:16:44,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:16:44,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:16:44,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:16:44,542 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 12:16:44,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:16:44,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:16:44,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:16:44,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:16:44,587 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:16:44,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:16:44,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:16:44,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:16:44,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:16:44,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:16:44,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:16:44,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:16:44,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:16:44,589 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:16:44,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:16:44,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:16:44,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:16:44,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:16:44,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:16:44,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:16:44,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:16:44,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:16:44,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:16:44,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:16:44,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:16:44,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:16:44,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:16:44,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:16:44,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:16:44,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:16:44,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:16:44,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:16:44,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:16:44,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:16:44,929 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:16:44,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-17 12:16:44,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82613a5ba/264f21aa49424798aafd65efd1f02c58/FLAG6f9b906e3 [2020-07-17 12:16:45,495 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:16:45,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-17 12:16:45,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82613a5ba/264f21aa49424798aafd65efd1f02c58/FLAG6f9b906e3 [2020-07-17 12:16:46,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82613a5ba/264f21aa49424798aafd65efd1f02c58 [2020-07-17 12:16:46,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:16:46,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:16:46,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:46,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:16:46,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:16:46,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d9f8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46, skipping insertion in model container [2020-07-17 12:16:46,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:16:46,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:16:46,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:46,268 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:16:46,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:16:46,307 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:16:46,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46 WrapperNode [2020-07-17 12:16:46,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:16:46,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:16:46,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:16:46,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:16:46,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (1/1) ... [2020-07-17 12:16:46,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:16:46,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:16:46,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:16:46,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:16:46,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (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 12:16:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:16:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:16:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:16:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:16:46,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:16:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:16:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:16:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:16:46,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:16:46,712 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:16:46,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:46 BoogieIcfgContainer [2020-07-17 12:16:46,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:16:46,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:16:46,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:16:46,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:16:46,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:16:46" (1/3) ... [2020-07-17 12:16:46,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d36a6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:46, skipping insertion in model container [2020-07-17 12:16:46,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:16:46" (2/3) ... [2020-07-17 12:16:46,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d36a6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:16:46, skipping insertion in model container [2020-07-17 12:16:46,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:16:46" (3/3) ... [2020-07-17 12:16:46,726 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-17 12:16:46,742 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:16:46,750 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:16:46,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:16:46,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:16:46,799 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:16:46,800 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:16:46,800 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:16:46,800 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:16:46,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:16:46,801 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:16:46,801 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:16:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-17 12:16:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:16:46,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:46,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:46,833 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-17 12:16:46,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:46,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004328982] [2020-07-17 12:16:46,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:46,992 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 12:16:46,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004328982] [2020-07-17 12:16:46,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:46,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:16:46,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39399855] [2020-07-17 12:16:46,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:16:46,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:16:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:47,014 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-17 12:16:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,039 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-17 12:16:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:16:47,040 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 12:16:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,049 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:16:47,049 INFO L226 Difference]: Without dead ends: 14 [2020-07-17 12:16:47,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:16:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-17 12:16:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-17 12:16:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-17 12:16:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-17 12:16:47,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-17 12:16:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,095 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-17 12:16:47,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:16:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-17 12:16:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:16:47,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:16:47,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-17 12:16:47,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245049046] [2020-07-17 12:16:47,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,144 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 12:16:47,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245049046] [2020-07-17 12:16:47,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:47,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:16:47,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052291371] [2020-07-17 12:16:47,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:16:47,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:16:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:47,148 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-17 12:16:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,164 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-17 12:16:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:16:47,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-17 12:16:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,166 INFO L225 Difference]: With dead ends: 20 [2020-07-17 12:16:47,166 INFO L226 Difference]: Without dead ends: 15 [2020-07-17 12:16:47,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-17 12:16:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-17 12:16:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-17 12:16:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-17 12:16:47,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-17 12:16:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-17 12:16:47,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:16:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-17 12:16:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 12:16:47,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:16:47,175 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-17 12:16:47,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108765535] [2020-07-17 12:16:47,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:47,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108765535] [2020-07-17 12:16:47,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:16:47,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:16:47,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234877411] [2020-07-17 12:16:47,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:16:47,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:16:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:47,214 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-17 12:16:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,224 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-17 12:16:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:16:47,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-17 12:16:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,225 INFO L225 Difference]: With dead ends: 25 [2020-07-17 12:16:47,225 INFO L226 Difference]: Without dead ends: 16 [2020-07-17 12:16:47,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:16:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-17 12:16:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-17 12:16:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-17 12:16:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-17 12:16:47,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-17 12:16:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,232 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-17 12:16:47,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:16:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-17 12:16:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 12:16:47,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:16:47,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-17 12:16:47,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123979420] [2020-07-17 12:16:47,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:47,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123979420] [2020-07-17 12:16:47,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457840820] [2020-07-17 12:16:47,304 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 12:16:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:16:47,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:16:47,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:47,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-07-17 12:16:47,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104519185] [2020-07-17 12:16:47,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:16:47,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:16:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:16:47,423 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-07-17 12:16:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,507 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-07-17 12:16:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:47,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-17 12:16:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,509 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:16:47,509 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 12:16:47,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 12:16:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 12:16:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:16:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-17 12:16:47,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2020-07-17 12:16:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,517 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-17 12:16:47,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:16:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-17 12:16:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:16:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:47,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:47,732 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1734889408, now seen corresponding path program 2 times [2020-07-17 12:16:47,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:47,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585140377] [2020-07-17 12:16:47,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 12:16:47,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585140377] [2020-07-17 12:16:47,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622922203] [2020-07-17 12:16:47,788 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 12:16:47,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:16:47,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:47,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:16:47,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 12:16:47,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:16:47,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-17 12:16:47,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581672861] [2020-07-17 12:16:47,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:16:47,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:16:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:16:47,898 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-17 12:16:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:47,972 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-17 12:16:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:16:47,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-17 12:16:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:47,974 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:16:47,974 INFO L226 Difference]: Without dead ends: 22 [2020-07-17 12:16:47,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-17 12:16:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-17 12:16:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-17 12:16:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-17 12:16:47,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2020-07-17 12:16:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:47,982 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-17 12:16:47,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:16:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-17 12:16:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:16:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:47,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:48,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:48,207 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1612949224, now seen corresponding path program 3 times [2020-07-17 12:16:48,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:48,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229991251] [2020-07-17 12:16:48,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:16:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-17 12:16:48,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229991251] [2020-07-17 12:16:48,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259020879] [2020-07-17 12:16:48,310 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) [2020-07-17 12:16:48,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-17 12:16:48,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:48,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:48,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 12:16:48,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:16:48,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-07-17 12:16:48,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825201773] [2020-07-17 12:16:48,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:16:48,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:16:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:16:48,384 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-17 12:16:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:48,410 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-07-17 12:16:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:16:48,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-17 12:16:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:48,411 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:16:48,411 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:16:48,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:16:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:16:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:16:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:16:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:16:48,413 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-07-17 12:16:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:48,413 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:16:48,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:16:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:16:48,414 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:16:48,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:48,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:16:48,683 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:16:48,683 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:48,683 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:16:48,683 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:16:48,683 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 12:16:48,684 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-17 12:16:48,685 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-17 12:16:48,685 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-17 12:16:48,685 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-17 12:16:48,685 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-17 12:16:48,685 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (= 4 main_~k~0) (and (<= main_~i~0 0) (<= (+ main_~j~0 100) main_~i~0))) [2020-07-17 12:16:48,685 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-17 12:16:48,686 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-17 12:16:48,686 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-17 12:16:48,686 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 12:16:48,686 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:48,686 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-17 12:16:48,686 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-17 12:16:48,687 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-17 12:16:48,687 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-17 12:16:48,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:48 BoogieIcfgContainer [2020-07-17 12:16:48,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:48,708 INFO L168 Benchmark]: Toolchain (without parser) took 2693.38 ms. Allocated memory was 146.8 MB in the beginning and 232.8 MB in the end (delta: 86.0 MB). Free memory was 104.7 MB in the beginning and 174.1 MB in the end (delta: -69.3 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,712 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.32 ms. Allocated memory is still 146.8 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,716 INFO L168 Benchmark]: Boogie Preprocessor took 156.92 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.9 MB in the beginning and 184.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,717 INFO L168 Benchmark]: RCFGBuilder took 250.85 ms. Allocated memory is still 205.0 MB. Free memory was 184.7 MB in the beginning and 171.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,718 INFO L168 Benchmark]: TraceAbstraction took 1987.54 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.8 MB in the beginning and 174.1 MB in the end (delta: -3.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:48,727 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 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.32 ms. Allocated memory is still 146.8 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.92 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.9 MB in the beginning and 184.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.85 ms. Allocated memory is still 205.0 MB. Free memory was 184.7 MB in the beginning and 171.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1987.54 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.8 MB in the beginning and 174.1 MB in the end (delta: -3.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 4 == k || (i <= 0 && j + 100 <= i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 5 SDslu, 166 SDs, 0 SdLazy, 48 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=5, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 15 PreInvPairs, 26 NumberOfFragments, 31 HoareAnnotationTreeSize, 15 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 146 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 4500 SizeOfPredicates, 5 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 43/57 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...