/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/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:35:03,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:35:03,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:35:03,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:35:03,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:35:03,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:35:03,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:35:03,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:35:03,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:35:03,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:35:03,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:35:03,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:35:04,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:35:04,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:35:04,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:35:04,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:35:04,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:35:04,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:35:04,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:35:04,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:35:04,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:35:04,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:35:04,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:35:04,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:35:04,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:35:04,022 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 16:35:04,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:35:04,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:35:04,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:35:04,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:35:04,061 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:35:04,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:35:04,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:35:04,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:35:04,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:35:04,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:35:04,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:35:04,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:35:04,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:35:04,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:35:04,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:35:04,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:35:04,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:04,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:35:04,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:35:04,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:35:04,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:35:04,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:35:04,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:35:04,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:35:04,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:35:04,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:35:04,392 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:35:04,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:35:04,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:35:04,400 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:35:04,401 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-22 16:35:04,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2000bf3d5/aad7d6c57f5d424fbec5e9df57a46a19/FLAG928497a77 [2020-08-22 16:35:04,850 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:35:04,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-22 16:35:04,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2000bf3d5/aad7d6c57f5d424fbec5e9df57a46a19/FLAG928497a77 [2020-08-22 16:35:05,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2000bf3d5/aad7d6c57f5d424fbec5e9df57a46a19 [2020-08-22 16:35:05,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:35:05,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:35:05,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:05,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:35:05,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:35:05,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7673bb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05, skipping insertion in model container [2020-08-22 16:35:05,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:35:05,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:35:05,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:05,431 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:35:05,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:05,458 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:35:05,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05 WrapperNode [2020-08-22 16:35:05,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:05,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:35:05,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:35:05,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:35:05,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (1/1) ... [2020-08-22 16:35:05,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:35:05,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:35:05,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:35:05,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:35:05,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (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 16:35:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:35:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:35:05,644 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:35:05,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:35:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:35:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:35:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:35:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:35:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:35:05,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:35:05,860 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:35:05,860 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:35:05,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:05 BoogieIcfgContainer [2020-08-22 16:35:05,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:35:05,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:35:05,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:35:05,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:35:05,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:35:05" (1/3) ... [2020-08-22 16:35:05,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425bf36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:05, skipping insertion in model container [2020-08-22 16:35:05,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:05" (2/3) ... [2020-08-22 16:35:05,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425bf36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:05, skipping insertion in model container [2020-08-22 16:35:05,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:05" (3/3) ... [2020-08-22 16:35:05,873 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-08-22 16:35:05,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:35:05,891 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:35:05,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:35:05,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:35:05,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:35:05,931 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:35:05,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:35:05,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:35:05,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:35:05,932 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:35:05,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:35:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:35:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:35:05,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:05,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:05,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 16:35:05,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:05,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921033292] [2020-08-22 16:35:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,258 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 16:35:06,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921033292] [2020-08-22 16:35:06,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:35:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:35:06,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537466931] [2020-08-22 16:35:06,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:06,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:06,338 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 16:35:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:06,427 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 16:35:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:06,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:35:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:06,439 INFO L225 Difference]: With dead ends: 30 [2020-08-22 16:35:06,439 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 16:35:06,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:35:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 16:35:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 16:35:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:35:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 16:35:06,487 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 16:35:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:06,487 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 16:35:06,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 16:35:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:35:06,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:06,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:06,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:35:06,491 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 16:35:06,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:06,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040045972] [2020-08-22 16:35:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:06,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040045972] [2020-08-22 16:35:06,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712519316] [2020-08-22 16:35:06,625 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 16:35:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:35:06,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:06,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:06,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-08-22 16:35:06,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171085085] [2020-08-22 16:35:06,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:35:06,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:35:06,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:06,795 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-22 16:35:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:06,857 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 16:35:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:35:06,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 16:35:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:06,859 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:35:06,859 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:35:06,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:35:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:35:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:35:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:35:06,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:35:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:06,868 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:35:06,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:35:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:35:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:35:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:06,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:07,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:35:07,084 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 16:35:07,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:07,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615060090] [2020-08-22 16:35:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:07,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615060090] [2020-08-22 16:35:07,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818668477] [2020-08-22 16:35:07,204 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 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 [2020-08-22 16:35:07,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:35:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:07,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:07,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-08-22 16:35:07,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441362400] [2020-08-22 16:35:07,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:35:07,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:35:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:35:07,304 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 16:35:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:07,396 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 16:35:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:35:07,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 16:35:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:07,398 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:35:07,398 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:35:07,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:35:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:35:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:35:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 16:35:07,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 16:35:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:07,406 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 16:35:07,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:35:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 16:35:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:35:07,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:07,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:07,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:07,622 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 16:35:07,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:07,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612578650] [2020-08-22 16:35:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:07,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612578650] [2020-08-22 16:35:07,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499798082] [2020-08-22 16:35:07,788 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 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 16:35:07,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:35:07,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:07,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:35:07,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:07,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:07,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-08-22 16:35:07,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310353012] [2020-08-22 16:35:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:35:07,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:35:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:07,891 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-08-22 16:35:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:07,962 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:35:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:35:07,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-08-22 16:35:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:07,964 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:35:07,964 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 16:35:07,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 16:35:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 16:35:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:35:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 16:35:07,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 16:35:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:07,972 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 16:35:07,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:35:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 16:35:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:35:07,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:07,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:08,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:08,189 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 16:35:08,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:08,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256726016] [2020-08-22 16:35:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:08,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256726016] [2020-08-22 16:35:08,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938827984] [2020-08-22 16:35:08,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:35:08,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:08,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:35:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:08,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:08,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-08-22 16:35:08,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482058779] [2020-08-22 16:35:08,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:35:08,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:35:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:35:08,566 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-08-22 16:35:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:08,649 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:35:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:35:08,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-22 16:35:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:08,651 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:35:08,651 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:35:08,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:35:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:35:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:35:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 16:35:08,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 16:35:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:08,659 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 16:35:08,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:35:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 16:35:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:35:08,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:08,661 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:08,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:08,875 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 16:35:08,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:08,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983026315] [2020-08-22 16:35:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:09,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983026315] [2020-08-22 16:35:09,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383164376] [2020-08-22 16:35:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 16:35:09,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-08-22 16:35:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:35:09,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:09,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:09,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-08-22 16:35:09,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867446067] [2020-08-22 16:35:09,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:35:09,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:09,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:35:09,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:09,224 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-08-22 16:35:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:09,320 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 16:35:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:35:09,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-08-22 16:35:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:09,322 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:35:09,322 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:35:09,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:35:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:35:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:35:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 16:35:09,331 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 16:35:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:09,332 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 16:35:09,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:35:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 16:35:09,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:35:09,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:09,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:09,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:35:09,547 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 16:35:09,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:09,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624741002] [2020-08-22 16:35:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:09,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624741002] [2020-08-22 16:35:09,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158685213] [2020-08-22 16:35:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-08-22 16:35:09,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-08-22 16:35:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:35:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:09,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:09,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-08-22 16:35:09,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408776364] [2020-08-22 16:35:09,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:35:09,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:35:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:35:09,884 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-08-22 16:35:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:09,994 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 16:35:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:09,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 16:35:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:09,996 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:35:09,996 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:35:09,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:35:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:35:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:35:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:35:10,003 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 16:35:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:10,004 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:35:10,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:35:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:35:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:35:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:10,005 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:10,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:10,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 16:35:10,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:10,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6360727] [2020-08-22 16:35:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:10,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6360727] [2020-08-22 16:35:10,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530698702] [2020-08-22 16:35:10,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-08-22 16:35:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:10,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:10,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-08-22 16:35:10,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034828786] [2020-08-22 16:35:10,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:35:10,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:10,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:35:10,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:10,551 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-08-22 16:35:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:10,672 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 16:35:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:35:10,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-22 16:35:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:10,674 INFO L225 Difference]: With dead ends: 43 [2020-08-22 16:35:10,674 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:35:10,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:35:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 16:35:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:35:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 16:35:10,681 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 16:35:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:10,682 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 16:35:10,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:35:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 16:35:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:35:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:10,683 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:10,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:10,899 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 16:35:10,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:10,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244217404] [2020-08-22 16:35:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:11,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244217404] [2020-08-22 16:35:11,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411013084] [2020-08-22 16:35:11,181 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:11,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:35:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:11,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:11,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-08-22 16:35:11,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131878418] [2020-08-22 16:35:11,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:35:11,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:35:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:35:11,319 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-08-22 16:35:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:11,436 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 16:35:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:35:11,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-22 16:35:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:11,438 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:35:11,438 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:35:11,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:35:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 16:35:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:35:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 16:35:11,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 16:35:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:11,445 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 16:35:11,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:35:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 16:35:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:35:11,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:11,447 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:11,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:35:11,661 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 16:35:11,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:11,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000297130] [2020-08-22 16:35:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:11,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000297130] [2020-08-22 16:35:11,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375763909] [2020-08-22 16:35:11,927 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:11,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-08-22 16:35:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-08-22 16:35:11,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:12,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:12,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-08-22 16:35:12,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914685459] [2020-08-22 16:35:12,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:35:12,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:35:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:12,053 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-08-22 16:35:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:12,179 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 16:35:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:35:12,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-08-22 16:35:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:12,180 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:35:12,180 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:35:12,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:35:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 16:35:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:35:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 16:35:12,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 16:35:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:12,192 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 16:35:12,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:35:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 16:35:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:35:12,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:12,194 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:12,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:12,404 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 16:35:12,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:12,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999267958] [2020-08-22 16:35:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:12,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999267958] [2020-08-22 16:35:12,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050172546] [2020-08-22 16:35:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:12,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-08-22 16:35:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:12,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:12,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-08-22 16:35:12,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500584080] [2020-08-22 16:35:12,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:35:12,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:35:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:35:12,900 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-22 16:35:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:13,069 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 16:35:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:13,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 16:35:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:13,073 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:35:13,073 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:35:13,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:35:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:35:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 16:35:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:35:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 16:35:13,086 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 16:35:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:13,087 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 16:35:13,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:35:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 16:35:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:35:13,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:13,089 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:13,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:13,303 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 16:35:13,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:13,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447085401] [2020-08-22 16:35:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:13,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447085401] [2020-08-22 16:35:13,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923168312] [2020-08-22 16:35:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:13,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-08-22 16:35:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-08-22 16:35:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:13,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:13,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-08-22 16:35:13,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912355317] [2020-08-22 16:35:13,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:35:13,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:35:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:13,817 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-08-22 16:35:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:13,981 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 16:35:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:35:13,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-08-22 16:35:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:13,982 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:35:13,983 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 16:35:13,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:35:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 16:35:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 16:35:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:35:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 16:35:13,990 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 16:35:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:13,991 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 16:35:13,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:35:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 16:35:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:35:13,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:13,992 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:14,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:35:14,205 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 16:35:14,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:14,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874880174] [2020-08-22 16:35:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:14,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874880174] [2020-08-22 16:35:14,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939751616] [2020-08-22 16:35:14,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:14,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-08-22 16:35:14,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:35:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:14,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:14,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-08-22 16:35:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102586410] [2020-08-22 16:35:14,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:35:14,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:35:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:35:14,756 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-08-22 16:35:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:14,946 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 16:35:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:35:14,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-08-22 16:35:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:14,948 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:35:14,948 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 16:35:14,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:35:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 16:35:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 16:35:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:35:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 16:35:14,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 16:35:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:14,956 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 16:35:14,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:35:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 16:35:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:35:14,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:14,958 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:15,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:35:15,172 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 16:35:15,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:15,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463671177] [2020-08-22 16:35:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:35:15,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463671177] [2020-08-22 16:35:15,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439097734] [2020-08-22 16:35:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-08-22 16:35:15,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:35:15,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:15,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-08-22 16:35:15,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270586754] [2020-08-22 16:35:15,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:35:15,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:35:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:15,771 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-08-22 16:35:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:15,977 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 16:35:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:35:15,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-08-22 16:35:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:15,980 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:35:15,980 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:35:15,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:35:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:35:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:35:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:35:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 16:35:15,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 16:35:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:15,994 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 16:35:15,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:35:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 16:35:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:35:15,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:15,995 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:16,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:35:16,196 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 16:35:16,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:16,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245516860] [2020-08-22 16:35:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:35:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245516860] [2020-08-22 16:35:16,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308796165] [2020-08-22 16:35:16,724 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:16,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:16,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-08-22 16:35:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:35:16,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:16,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-08-22 16:35:16,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711542402] [2020-08-22 16:35:16,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:35:16,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:35:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:35:16,867 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-08-22 16:35:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:17,071 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 16:35:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:35:17,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-08-22 16:35:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:17,073 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:35:17,073 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 16:35:17,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:35:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 16:35:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 16:35:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:35:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 16:35:17,084 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 16:35:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:17,085 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 16:35:17,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:35:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 16:35:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 16:35:17,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:17,088 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:17,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:17,302 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 16:35:17,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:17,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991924856] [2020-08-22 16:35:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:17,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:35:18,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991924856] [2020-08-22 16:35:18,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511485430] [2020-08-22 16:35:18,688 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:18,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-08-22 16:35:18,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-08-22 16:35:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:35:18,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:18,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-08-22 16:35:18,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526899738] [2020-08-22 16:35:18,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 16:35:18,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 16:35:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:35:18,860 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-22 16:35:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:19,329 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 16:35:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 16:35:19,330 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-22 16:35:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:19,331 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:35:19,331 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:35:19,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:35:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:35:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 16:35:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:35:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 16:35:19,337 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 16:35:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:19,337 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 16:35:19,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 16:35:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 16:35:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 16:35:19,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:19,339 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:19,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:35:19,553 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 16:35:19,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:19,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321840500] [2020-08-22 16:35:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:35:20,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321840500] [2020-08-22 16:35:20,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845702084] [2020-08-22 16:35:20,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:20,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:20,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-08-22 16:35:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:35:20,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:35:20,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-08-22 16:35:20,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631788358] [2020-08-22 16:35:20,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:35:20,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:35:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:20,318 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-22 16:35:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:20,679 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-08-22 16:35:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:35:20,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-22 16:35:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:20,680 INFO L225 Difference]: With dead ends: 63 [2020-08-22 16:35:20,680 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:35:20,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 16:35:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:35:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:35:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:35:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:35:20,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-08-22 16:35:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:20,683 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:35:20,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:35:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:35:20,683 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:35:20,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:35:20,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:35:20,912 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:35:20,912 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:35:20,912 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:35:20,912 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:35:20,912 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:35:20,913 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:35:20,913 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-22 16:35:20,913 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 16:35:20,913 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 16:35:20,913 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-22 16:35:20,913 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-22 16:35:20,914 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-08-22 16:35:20,914 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-22 16:35:20,914 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-22 16:35:20,914 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-22 16:35:20,914 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-22 16:35:20,914 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-22 16:35:20,914 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-22 16:35:20,914 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 16:35:20,915 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-22 16:35:20,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:35:20 BoogieIcfgContainer [2020-08-22 16:35:20,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:35:20,923 INFO L168 Benchmark]: Toolchain (without parser) took 15666.15 ms. Allocated memory was 141.6 MB in the beginning and 407.9 MB in the end (delta: 266.3 MB). Free memory was 105.4 MB in the beginning and 369.2 MB in the end (delta: -263.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,923 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.20 ms. Allocated memory is still 141.6 MB. Free memory was 105.1 MB in the beginning and 95.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,924 INFO L168 Benchmark]: Boogie Preprocessor took 28.03 ms. Allocated memory is still 141.6 MB. Free memory was 95.9 MB in the beginning and 94.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,925 INFO L168 Benchmark]: RCFGBuilder took 375.81 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 94.6 MB in the beginning and 172.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,926 INFO L168 Benchmark]: TraceAbstraction took 15055.16 ms. Allocated memory was 203.4 MB in the beginning and 407.9 MB in the end (delta: 204.5 MB). Free memory was 172.0 MB in the beginning and 369.2 MB in the end (delta: -197.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,928 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 202.20 ms. Allocated memory is still 141.6 MB. Free memory was 105.1 MB in the beginning and 95.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.03 ms. Allocated memory is still 141.6 MB. Free memory was 95.9 MB in the beginning and 94.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.81 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 94.6 MB in the beginning and 172.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15055.16 ms. Allocated memory was 203.4 MB in the beginning and 407.9 MB in the end (delta: 204.5 MB). Free memory was 172.0 MB in the beginning and 369.2 MB in the end (delta: -197.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 526 SDslu, 2176 SDs, 0 SdLazy, 1348 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1334 SyntacticMatches, 1 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 405744 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2400 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 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...