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/array-examples/standard_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:00,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:00,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:00,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:00,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:00,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:00,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:00,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:00,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:00,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:00,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:00,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:00,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:00,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:00,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:00,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:00,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:00,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:00,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:00,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:00,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:00,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:00,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:00,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:00,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:47:00,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:47:00,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:47:00,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:47:00,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:47:00,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:47:00,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:00,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:00,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:00,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:00,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:00,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:00,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:00,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:00,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:00,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:01,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:01,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:47:01,016 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:01,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:01,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:01,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:01,019 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:01,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:01,019 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:01,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:01,020 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:01,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:01,021 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:01,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:01,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:01,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:01,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:01,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:01,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:01,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:01,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:01,320 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:01,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:01,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:01,336 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:01,336 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:01,337 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-10-14 21:47:01,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860ed802e/59b26c2f7c0c496fa5f19d55f945fb70/FLAGda2c2c9f8 [2019-10-14 21:47:01,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:01,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-10-14 21:47:01,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860ed802e/59b26c2f7c0c496fa5f19d55f945fb70/FLAGda2c2c9f8 [2019-10-14 21:47:02,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860ed802e/59b26c2f7c0c496fa5f19d55f945fb70 [2019-10-14 21:47:02,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:02,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:02,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:02,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:02,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:02,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d289120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02, skipping insertion in model container [2019-10-14 21:47:02,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,276 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:02,293 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:02,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:02,488 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:02,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:02,525 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:02,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02 WrapperNode [2019-10-14 21:47:02,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:02,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:02,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:02,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:02,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... [2019-10-14 21:47:02,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:02,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:02,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:02,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:02,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:02,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:02,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:02,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:02,984 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:02,984 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:47:02,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:02 BoogieIcfgContainer [2019-10-14 21:47:02,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:02,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:02,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:02,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:02,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:02" (1/3) ... [2019-10-14 21:47:02,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd1b37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:02, skipping insertion in model container [2019-10-14 21:47:02,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:02" (2/3) ... [2019-10-14 21:47:02,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd1b37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:02, skipping insertion in model container [2019-10-14 21:47:02,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:02" (3/3) ... [2019-10-14 21:47:03,000 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2019-10-14 21:47:03,026 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:03,035 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:03,046 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:03,068 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:03,068 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:03,068 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:03,068 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:03,068 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:03,068 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:03,068 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:03,069 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:47:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:03,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,093 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,095 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-14 21:47:03,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115451657] [2019-10-14 21:47:03,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:03,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115451657] [2019-10-14 21:47:03,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:03,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:03,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431527438] [2019-10-14 21:47:03,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:03,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:03,295 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:47:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,401 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-14 21:47:03,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:03,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:47:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,413 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:47:03,414 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:47:03,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:47:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:47:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:47:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 21:47:03,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-14 21:47:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,475 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 21:47:03,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 21:47:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:03,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,478 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,479 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-14 21:47:03,480 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358278647] [2019-10-14 21:47:03,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:03,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358278647] [2019-10-14 21:47:03,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:03,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:03,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505896862] [2019-10-14 21:47:03,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:03,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:03,588 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-10-14 21:47:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,663 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 21:47:03,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:03,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:47:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,665 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:47:03,665 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:47:03,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:47:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:47:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:47:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:47:03,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-14 21:47:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,674 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:47:03,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:47:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:47:03,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,675 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,676 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-14 21:47:03,677 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683239285] [2019-10-14 21:47:03,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:03,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683239285] [2019-10-14 21:47:03,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:03,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:03,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943271027] [2019-10-14 21:47:03,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:03,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:03,770 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:47:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,860 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:47:03,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:03,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:47:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,863 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:47:03,863 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:47:03,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:47:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-14 21:47:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:47:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:47:03,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-14 21:47:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,876 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:47:03,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:47:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:47:03,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,878 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,879 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-14 21:47:03,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734007978] [2019-10-14 21:47:03,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:03,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734007978] [2019-10-14 21:47:03,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483728388] [2019-10-14 21:47:03,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:04,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:04,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:04,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:04,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:47:04,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579479933] [2019-10-14 21:47:04,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:47:04,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:47:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:04,105 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 21:47:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:04,230 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:47:04,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:47:04,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:47:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:04,233 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:47:04,233 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:47:04,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:47:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-14 21:47:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:47:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:47:04,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:47:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:04,248 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:47:04,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:47:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:47:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:47:04,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:04,249 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:04,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:04,455 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-14 21:47:04,457 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:04,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-14 21:47:04,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:04,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:04,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:47:04,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-14 21:47:04,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180747417] [2019-10-14 21:47:04,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:04,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:04,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:04,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:04,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:47:04,659 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:04,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:47:04,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805290973] [2019-10-14 21:47:04,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:04,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:04,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:04,662 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-10-14 21:47:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:04,796 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-10-14 21:47:04,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:04,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 21:47:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:04,798 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:47:04,798 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:47:04,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:47:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-14 21:47:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:47:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:47:04,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-10-14 21:47:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:04,810 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:47:04,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:47:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:47:04,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:04,813 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:05,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,018 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-10-14 21:47:05,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:05,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904688087] [2019-10-14 21:47:05,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:05,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904688087] [2019-10-14 21:47:05,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997045176] [2019-10-14 21:47:05,159 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:47:05,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:05,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:05,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:05,249 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:05,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:47:05,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048751829] [2019-10-14 21:47:05,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:05,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:05,251 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-10-14 21:47:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:05,396 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-14 21:47:05,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:05,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:47:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:05,398 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:47:05,398 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:47:05,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:47:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-10-14 21:47:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:47:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:47:05,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-10-14 21:47:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:05,415 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:47:05,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:47:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:47:05,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:05,416 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:05,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,629 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:05,630 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-10-14 21:47:05,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:05,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538337635] [2019-10-14 21:47:05,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:05,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538337635] [2019-10-14 21:47:05,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167348539] [2019-10-14 21:47:05,750 INFO L92 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 [2019-10-14 21:47:05,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:05,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:05,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:05,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:47:05,878 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:05,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-10-14 21:47:05,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997235901] [2019-10-14 21:47:05,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:05,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:05,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:05,881 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-10-14 21:47:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:06,069 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-10-14 21:47:06,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:06,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2019-10-14 21:47:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:06,071 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:47:06,071 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:47:06,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:47:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2019-10-14 21:47:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:47:06,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2019-10-14 21:47:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:06,080 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:47:06,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:47:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:06,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:06,081 INFO L380 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:06,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:06,282 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:06,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1290022011, now seen corresponding path program 5 times [2019-10-14 21:47:06,283 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:06,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510353155] [2019-10-14 21:47:06,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:06,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510353155] [2019-10-14 21:47:06,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757428130] [2019-10-14 21:47:06,446 INFO L92 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 [2019-10-14 21:47:06,869 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:47:06,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:06,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:06,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:47:06,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:06,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2019-10-14 21:47:06,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344224161] [2019-10-14 21:47:06,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:06,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:06,997 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 20 states. [2019-10-14 21:47:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:07,187 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-10-14 21:47:07,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:47:07,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-10-14 21:47:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:07,190 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:47:07,190 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:47:07,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:47:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2019-10-14 21:47:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:47:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:47:07,198 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2019-10-14 21:47:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:07,199 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:47:07,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:47:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:47:07,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:07,200 INFO L380 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:07,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:07,402 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 678305990, now seen corresponding path program 6 times [2019-10-14 21:47:07,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:07,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525061063] [2019-10-14 21:47:07,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:07,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:07,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:07,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525061063] [2019-10-14 21:47:07,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239632826] [2019-10-14 21:47:07,517 INFO L92 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 [2019-10-14 21:47:07,796 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:07,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:07,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:07,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:07,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:07,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:07,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590678697] [2019-10-14 21:47:07,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:07,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:07,815 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-10-14 21:47:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:07,989 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-10-14 21:47:07,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:07,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-14 21:47:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:07,991 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:47:07,991 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:47:07,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:47:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-10-14 21:47:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:47:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-10-14 21:47:07,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-10-14 21:47:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:08,000 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-10-14 21:47:08,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-10-14 21:47:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:47:08,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:08,001 INFO L380 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:08,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:08,206 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1729755721, now seen corresponding path program 7 times [2019-10-14 21:47:08,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:08,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743753794] [2019-10-14 21:47:08,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:08,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:08,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:08,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743753794] [2019-10-14 21:47:08,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024447311] [2019-10-14 21:47:08,335 INFO L92 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 [2019-10-14 21:47:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:08,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:08,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:47:08,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:08,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 27 [2019-10-14 21:47:08,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466514508] [2019-10-14 21:47:08,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:47:08,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:47:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:08,575 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 27 states. [2019-10-14 21:47:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:08,897 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2019-10-14 21:47:08,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:47:08,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2019-10-14 21:47:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:08,898 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:47:08,899 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:47:08,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:47:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2019-10-14 21:47:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:47:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-14 21:47:08,917 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 38 [2019-10-14 21:47:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:08,918 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-14 21:47:08,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:47:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-14 21:47:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:08,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:08,922 INFO L380 BasicCegarLoop]: trace histogram [23, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:09,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:09,123 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -53699638, now seen corresponding path program 8 times [2019-10-14 21:47:09,124 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:09,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152266006] [2019-10-14 21:47:09,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:09,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:09,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 21:47:09,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152266006] [2019-10-14 21:47:09,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525116147] [2019-10-14 21:47:09,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:09,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:09,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:09,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:47:09,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:09,726 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:09,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26] total 34 [2019-10-14 21:47:09,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248386168] [2019-10-14 21:47:09,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:47:09,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:09,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:47:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=593, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:47:09,728 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 34 states. [2019-10-14 21:47:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:10,022 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2019-10-14 21:47:10,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:47:10,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2019-10-14 21:47:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:10,024 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:47:10,024 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:47:10,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=593, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:47:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:47:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2019-10-14 21:47:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:47:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-14 21:47:10,032 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 46 [2019-10-14 21:47:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:10,033 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-14 21:47:10,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:47:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-14 21:47:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:47:10,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:10,034 INFO L380 BasicCegarLoop]: trace histogram [30, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:10,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:10,237 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1314604649, now seen corresponding path program 9 times [2019-10-14 21:47:10,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:10,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915943754] [2019-10-14 21:47:10,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-14 21:47:10,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915943754] [2019-10-14 21:47:10,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030885024] [2019-10-14 21:47:10,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:47:10,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:10,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:10,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:10,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-14 21:47:10,983 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:10,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:10,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77897828] [2019-10-14 21:47:10,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:10,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:10,984 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 14 states. [2019-10-14 21:47:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:11,166 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2019-10-14 21:47:11,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:11,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-10-14 21:47:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:11,168 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:47:11,169 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:47:11,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:47:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-10-14 21:47:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:47:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-10-14 21:47:11,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2019-10-14 21:47:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:11,179 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-10-14 21:47:11,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-10-14 21:47:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:47:11,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:11,180 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:11,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:11,385 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash -19822330, now seen corresponding path program 10 times [2019-10-14 21:47:11,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:11,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457734418] [2019-10-14 21:47:11,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-14 21:47:11,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457734418] [2019-10-14 21:47:11,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11831363] [2019-10-14 21:47:11,549 INFO L92 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 [2019-10-14 21:47:11,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:11,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:11,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:47:11,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:11,964 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:11,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 33] total 42 [2019-10-14 21:47:11,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699770665] [2019-10-14 21:47:11,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:47:11,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:11,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:47:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=901, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:47:11,967 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 42 states. [2019-10-14 21:47:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:12,342 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2019-10-14 21:47:12,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:47:12,343 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 55 [2019-10-14 21:47:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:12,345 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:47:12,345 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:47:12,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=821, Invalid=901, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:47:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:47:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2019-10-14 21:47:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:47:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-10-14 21:47:12,355 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 55 [2019-10-14 21:47:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:12,355 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-10-14 21:47:12,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:47:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-10-14 21:47:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:47:12,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:12,357 INFO L380 BasicCegarLoop]: trace histogram [38, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:12,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:12,561 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1728612361, now seen corresponding path program 11 times [2019-10-14 21:47:12,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:12,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107402217] [2019-10-14 21:47:12,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-10-14 21:47:12,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107402217] [2019-10-14 21:47:12,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336872818] [2019-10-14 21:47:12,754 INFO L92 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