/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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:58:41,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:58:41,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:58:41,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:58:41,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:58:41,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:58:41,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:58:41,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:58:41,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:58:41,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:58:41,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:58:41,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:58:41,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:58:41,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:58:41,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:58:41,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:58:41,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:58:41,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:58:41,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:58:42,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:58:42,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:58:42,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:58:42,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:58:42,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:58:42,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:58:42,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:58:42,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:58:42,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:58:42,042 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 [2020-08-22 16:58:42,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:58:42,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:58:42,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:58:42,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:58:42,081 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:58:42,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:58:42,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:58:42,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:58:42,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:58:42,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:58:42,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:58:42,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:58:42,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:58:42,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:58:42,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:58:42,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:58:42,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:58:42,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:58:42,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:58:42,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:58:42,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:58:42,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:58:42,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:58:42,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:58:42,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:58:42,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:58:42,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:58:42,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:58:42,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:58:42,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:58:42,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:58:42,415 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:58:42,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:58:42,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:58:42,421 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:58:42,421 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-22 16:58:42,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08b4af2d/2324610fa32f4fb59dc95abf0cbd391e/FLAGe93a01fcd [2020-08-22 16:58:42,892 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:58:42,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-22 16:58:42,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08b4af2d/2324610fa32f4fb59dc95abf0cbd391e/FLAGe93a01fcd [2020-08-22 16:58:43,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08b4af2d/2324610fa32f4fb59dc95abf0cbd391e [2020-08-22 16:58:43,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:58:43,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:58:43,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:43,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:58:43,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:58:43,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc3c06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43, skipping insertion in model container [2020-08-22 16:58:43,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:58:43,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:58:43,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:43,588 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:58:43,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:58:43,621 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:58:43,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43 WrapperNode [2020-08-22 16:58:43,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:58:43,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:58:43,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:58:43,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:58:43,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... [2020-08-22 16:58:43,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:58:43,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:58:43,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:58:43,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:58:43,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:58:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:58:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:58:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:58:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:58:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:58:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:58:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:58:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:58:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:58:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:58:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:58:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:58:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:58:44,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:58:44,086 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:58:44,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:44 BoogieIcfgContainer [2020-08-22 16:58:44,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:58:44,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:58:44,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:58:44,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:58:44,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:58:43" (1/3) ... [2020-08-22 16:58:44,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1352cd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:44, skipping insertion in model container [2020-08-22 16:58:44,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:58:43" (2/3) ... [2020-08-22 16:58:44,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1352cd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:58:44, skipping insertion in model container [2020-08-22 16:58:44,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:58:44" (3/3) ... [2020-08-22 16:58:44,115 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-22 16:58:44,133 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:58:44,140 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:58:44,169 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:58:44,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:58:44,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:58:44,192 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:58:44,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:58:44,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:58:44,192 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:58:44,193 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:58:44,193 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:58:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 16:58:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:58:44,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:44,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:44,216 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-22 16:58:44,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:44,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464495875] [2020-08-22 16:58:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:44,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:44,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464495875] [2020-08-22 16:58:44,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:58:44,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:58:44,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495559730] [2020-08-22 16:58:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:58:44,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:44,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:58:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:58:44,874 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-22 16:58:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:45,188 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-08-22 16:58:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:58:45,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-22 16:58:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:45,201 INFO L225 Difference]: With dead ends: 48 [2020-08-22 16:58:45,201 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:58:45,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:58:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:58:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-22 16:58:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:58:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-22 16:58:45,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-22 16:58:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:45,245 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-22 16:58:45,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:58:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-22 16:58:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:58:45,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:45,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:45,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:58:45,247 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-22 16:58:45,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:45,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661546030] [2020-08-22 16:58:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:45,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:45,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661546030] [2020-08-22 16:58:45,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361399194] [2020-08-22 16:58:45,855 INFO L95 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 [2020-08-22 16:58:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:58:45,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:46,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:46,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2020-08-22 16:58:46,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18955392] [2020-08-22 16:58:46,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:58:46,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:58:46,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:58:46,214 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 20 states. [2020-08-22 16:58:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:46,639 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-08-22 16:58:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:58:46,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-08-22 16:58:46,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:46,641 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:58:46,641 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:58:46,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2020-08-22 16:58:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:58:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:58:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:58:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-22 16:58:46,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-08-22 16:58:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:46,649 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-22 16:58:46,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:58:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-22 16:58:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:58:46,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:46,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:46,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:58:46,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-22 16:58:46,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:46,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720771834] [2020-08-22 16:58:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:47,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:47,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720771834] [2020-08-22 16:58:47,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917073988] [2020-08-22 16:58:47,477 INFO L95 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) [2020-08-22 16:58:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:47,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2020-08-22 16:58:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:47,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:47,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2020-08-22 16:58:47,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216942469] [2020-08-22 16:58:47,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:58:47,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:58:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:58:47,954 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 24 states. [2020-08-22 16:58:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:48,668 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-08-22 16:58:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:58:48,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2020-08-22 16:58:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:48,671 INFO L225 Difference]: With dead ends: 42 [2020-08-22 16:58:48,671 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:58:48,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:58:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:58:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 16:58:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 16:58:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-22 16:58:48,679 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2020-08-22 16:58:48,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:48,679 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-22 16:58:48,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:58:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-22 16:58:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:58:48,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:48,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:48,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:48,897 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-22 16:58:48,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:48,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340535147] [2020-08-22 16:58:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:49,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:49,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340535147] [2020-08-22 16:58:49,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298812413] [2020-08-22 16:58:49,674 INFO L95 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 [2020-08-22 16:58:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:58:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:50,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:50,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2020-08-22 16:58:50,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659639629] [2020-08-22 16:58:50,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:58:50,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:58:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:58:50,220 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 28 states. [2020-08-22 16:58:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:53,029 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-08-22 16:58:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:58:53,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 25 [2020-08-22 16:58:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:53,031 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:58:53,031 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:58:53,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 16:58:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:58:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:58:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:58:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-08-22 16:58:53,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-08-22 16:58:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:53,039 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-08-22 16:58:53,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:58:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-08-22 16:58:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 16:58:53,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:53,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:53,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:53,242 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1723884779, now seen corresponding path program 1 times [2020-08-22 16:58:53,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:53,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99876688] [2020-08-22 16:58:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:53,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:53,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99876688] [2020-08-22 16:58:53,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138973573] [2020-08-22 16:58:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:58:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 32 conjunts are in the unsatisfiable core [2020-08-22 16:58:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:54,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:54,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-08-22 16:58:54,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621593652] [2020-08-22 16:58:54,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 16:58:54,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 16:58:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-08-22 16:58:54,506 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 29 states. [2020-08-22 16:58:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:55,483 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-22 16:58:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:58:55,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-08-22 16:58:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:55,485 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:58:55,486 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:58:55,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:58:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:58:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-22 16:58:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 16:58:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-22 16:58:55,494 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-08-22 16:58:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:55,494 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-22 16:58:55,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 16:58:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-22 16:58:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 16:58:55,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:55,496 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:55,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:55,705 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -486027115, now seen corresponding path program 2 times [2020-08-22 16:58:55,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:55,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367701650] [2020-08-22 16:58:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:55,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:55,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367701650] [2020-08-22 16:58:55,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166935545] [2020-08-22 16:58:55,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:55,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:58:55,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:58:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 40 conjunts are in the unsatisfiable core [2020-08-22 16:58:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:56,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:58:56,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2020-08-22 16:58:56,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017684509] [2020-08-22 16:58:56,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:58:56,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:58:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:58:56,486 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 26 states. [2020-08-22 16:58:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:57,171 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-08-22 16:58:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:58:57,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-08-22 16:58:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:57,175 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:58:57,175 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:58:57,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 16:58:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:58:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 16:58:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 16:58:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-08-22 16:58:57,184 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2020-08-22 16:58:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:57,185 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-08-22 16:58:57,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:58:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-08-22 16:58:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:58:57,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:57,186 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:58:57,401 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -301139428, now seen corresponding path program 3 times [2020-08-22 16:58:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:57,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377948441] [2020-08-22 16:58:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:58,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:58:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:58:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:58,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377948441] [2020-08-22 16:58:58,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537588541] [2020-08-22 16:58:58,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true