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/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:33,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:33,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:33,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:33,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:33,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:33,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:33,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:33,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:33,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:33,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:33,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:33,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:33,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:33,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:33,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:33,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:33,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:33,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:34,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:34,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:34,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:34,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:34,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:34,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:34,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:34,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:34,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:34,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:34,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:34,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:34,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:34,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:34,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:34,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:34,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:34,017 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 [2019-10-13 17:43:34,038 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:34,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:34,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:34,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:34,042 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:34,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:34,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:34,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:34,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:34,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:34,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:34,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:34,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:34,045 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:34,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:34,045 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:34,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:34,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:34,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:34,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:34,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:34,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:34,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:34,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:34,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:34,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:34,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:34,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:34,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:34,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:34,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:34,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:34,352 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:34,352 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:34,353 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-10-13 17:43:34,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3305b51bd/9ae0fbe462bb4945a4c3c0f296744203/FLAG0d518fecb [2019-10-13 17:43:34,841 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:34,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-10-13 17:43:34,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3305b51bd/9ae0fbe462bb4945a4c3c0f296744203/FLAG0d518fecb [2019-10-13 17:43:35,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3305b51bd/9ae0fbe462bb4945a4c3c0f296744203 [2019-10-13 17:43:35,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:35,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:35,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:35,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:35,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:35,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fbaaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35, skipping insertion in model container [2019-10-13 17:43:35,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,310 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:35,331 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:35,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:35,562 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:35,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:35,698 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:35,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35 WrapperNode [2019-10-13 17:43:35,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:35,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:35,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:35,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:35,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (1/1) ... [2019-10-13 17:43:35,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:35,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:35,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:35,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:35,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (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 [2019-10-13 17:43:35,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:35,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:35,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:35,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:36,109 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:36,109 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:43:36,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:36 BoogieIcfgContainer [2019-10-13 17:43:36,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:36,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:36,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:36,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:36,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:35" (1/3) ... [2019-10-13 17:43:36,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:36, skipping insertion in model container [2019-10-13 17:43:36,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:35" (2/3) ... [2019-10-13 17:43:36,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:36, skipping insertion in model container [2019-10-13 17:43:36,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:36" (3/3) ... [2019-10-13 17:43:36,119 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2019-10-13 17:43:36,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:36,137 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:36,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:36,176 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:36,176 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:36,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:36,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:36,177 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:36,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:36,177 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:36,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:43:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:36,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:36,202 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:36,204 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2019-10-13 17:43:36,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:36,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541967986] [2019-10-13 17:43:36,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:36,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541967986] [2019-10-13 17:43:36,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:36,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:43:36,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894780353] [2019-10-13 17:43:36,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:43:36,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:43:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:36,439 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:43:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:36,539 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-10-13 17:43:36,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:36,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:43:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:36,550 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:43:36,550 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:43:36,554 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 [2019-10-13 17:43:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:43:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:43:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:43:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-13 17:43:36,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-13 17:43:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:36,594 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-13 17:43:36,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:43:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-13 17:43:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:36,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:36,595 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:36,596 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2019-10-13 17:43:36,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:36,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735122126] [2019-10-13 17:43:36,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:36,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735122126] [2019-10-13 17:43:36,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:36,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:36,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615031517] [2019-10-13 17:43:36,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:36,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:36,681 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-13 17:43:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:36,759 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:43:36,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:36,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:43:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:36,761 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:43:36,761 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:43:36,762 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 [2019-10-13 17:43:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:43:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:43:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:43:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:43:36,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-13 17:43:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:36,771 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:43:36,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:43:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:43:36,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:36,772 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:36,773 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2019-10-13 17:43:36,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:36,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079582632] [2019-10-13 17:43:36,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:36,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079582632] [2019-10-13 17:43:36,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:36,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:36,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802222461] [2019-10-13 17:43:36,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:36,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:36,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:36,872 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-13 17:43:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:36,947 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-13 17:43:36,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:36,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:43:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:36,950 INFO L225 Difference]: With dead ends: 44 [2019-10-13 17:43:36,950 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 17:43:36,951 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 [2019-10-13 17:43:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 17:43:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 17:43:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:43:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-13 17:43:36,959 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2019-10-13 17:43:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:36,959 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-13 17:43:36,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-13 17:43:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:43:36,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:36,961 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:36,961 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2019-10-13 17:43:36,962 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:36,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123067270] [2019-10-13 17:43:36,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:36,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:37,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123067270] [2019-10-13 17:43:37,040 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:37,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:37,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563838511] [2019-10-13 17:43:37,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:37,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:37,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:37,043 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2019-10-13 17:43:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:37,143 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-10-13 17:43:37,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:37,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:43:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:37,145 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:43:37,145 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:43:37,146 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 [2019-10-13 17:43:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:43:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-13 17:43:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:43:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-13 17:43:37,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-10-13 17:43:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:37,153 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-13 17:43:37,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-13 17:43:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:43:37,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:37,155 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2019-10-13 17:43:37,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:37,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799309566] [2019-10-13 17:43:37,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:37,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799309566] [2019-10-13 17:43:37,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666302773] [2019-10-13 17:43:37,234 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 [2019-10-13 17:43:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:37,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:37,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:37,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:43:37,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614239919] [2019-10-13 17:43:37,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:37,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:37,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:37,337 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2019-10-13 17:43:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:37,420 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-10-13 17:43:37,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:37,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-13 17:43:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:37,422 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:43:37,422 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:43:37,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:43:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 17:43:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:43:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:43:37,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2019-10-13 17:43:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:37,429 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:43:37,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:43:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:43:37,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,430 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:37,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:37,632 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 442145592, now seen corresponding path program 2 times [2019-10-13 17:43:37,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:37,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465403544] [2019-10-13 17:43:37,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:37,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465403544] [2019-10-13 17:43:37,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841298480] [2019-10-13 17:43:37,721 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 [2019-10-13 17:43:37,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:37,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:37,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:37,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:37,801 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:37,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:43:37,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69643849] [2019-10-13 17:43:37,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:43:37,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:43:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:37,803 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2019-10-13 17:43:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:37,886 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-13 17:43:37,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:43:37,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-13 17:43:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:37,888 INFO L225 Difference]: With dead ends: 60 [2019-10-13 17:43:37,888 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:43:37,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:43:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 17:43:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:43:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-10-13 17:43:37,900 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2019-10-13 17:43:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:37,901 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-10-13 17:43:37,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:43:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-10-13 17:43:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:43:37,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,904 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:38,107 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash -137161642, now seen corresponding path program 3 times [2019-10-13 17:43:38,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676755698] [2019-10-13 17:43:38,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:38,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676755698] [2019-10-13 17:43:38,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463681123] [2019-10-13 17:43:38,185 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 [2019-10-13 17:43:38,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:38,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:38,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:38,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:38,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:38,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:43:38,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037164176] [2019-10-13 17:43:38,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:38,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:38,253 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2019-10-13 17:43:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,375 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-13 17:43:38,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:43:38,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-13 17:43:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,376 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:43:38,377 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:43:38,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:43:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-13 17:43:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:43:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2019-10-13 17:43:38,389 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2019-10-13 17:43:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,389 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2019-10-13 17:43:38,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2019-10-13 17:43:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:43:38,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,393 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:38,594 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -890436781, now seen corresponding path program 4 times [2019-10-13 17:43:38,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372944254] [2019-10-13 17:43:38,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:38,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372944254] [2019-10-13 17:43:38,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058369643] [2019-10-13 17:43:38,732 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 [2019-10-13 17:43:38,782 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:38,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:38,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:38,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:38,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:38,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:43:38,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715829692] [2019-10-13 17:43:38,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:38,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:38,815 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 9 states. [2019-10-13 17:43:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,921 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-10-13 17:43:38,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:43:38,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-10-13 17:43:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,923 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:43:38,923 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:43:38,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:43:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-10-13 17:43:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:43:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-10-13 17:43:38,931 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2019-10-13 17:43:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,931 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-10-13 17:43:38,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-10-13 17:43:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:43:38,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,933 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:39,134 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash -250762123, now seen corresponding path program 5 times [2019-10-13 17:43:39,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146143090] [2019-10-13 17:43:39,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:39,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146143090] [2019-10-13 17:43:39,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896608042] [2019-10-13 17:43:39,266 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 [2019-10-13 17:43:39,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 17:43:39,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:39,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:39,368 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:43:39,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143355228] [2019-10-13 17:43:39,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:43:39,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:43:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:39,371 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2019-10-13 17:43:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,476 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-10-13 17:43:39,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:39,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-10-13 17:43:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,478 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:43:39,478 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:43:39,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:43:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-13 17:43:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:43:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-10-13 17:43:39,492 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 34 [2019-10-13 17:43:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,493 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-10-13 17:43:39,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:43:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-10-13 17:43:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:43:39,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,496 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:39,697 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1537034928, now seen corresponding path program 6 times [2019-10-13 17:43:39,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794674725] [2019-10-13 17:43:39,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:43:39,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794674725] [2019-10-13 17:43:39,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928438774] [2019-10-13 17:43:39,832 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 [2019-10-13 17:43:39,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:43:39,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:39,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:39,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:43:39,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819410602] [2019-10-13 17:43:39,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:39,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:39,957 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 14 states. [2019-10-13 17:43:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,098 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2019-10-13 17:43:40,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:40,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-13 17:43:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,099 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:43:40,100 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:43:40,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:43:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-10-13 17:43:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:43:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2019-10-13 17:43:40,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 39 [2019-10-13 17:43:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,119 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2019-10-13 17:43:40,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2019-10-13 17:43:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:43:40,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,122 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,323 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 747611417, now seen corresponding path program 7 times [2019-10-13 17:43:40,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594209182] [2019-10-13 17:43:40,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:40,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594209182] [2019-10-13 17:43:40,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476713967] [2019-10-13 17:43:40,430 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 [2019-10-13 17:43:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:40,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:43:40,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533684659] [2019-10-13 17:43:40,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:43:40,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:43:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:40,517 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 12 states. [2019-10-13 17:43:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,602 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2019-10-13 17:43:40,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:43:40,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-10-13 17:43:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,604 INFO L225 Difference]: With dead ends: 104 [2019-10-13 17:43:40,604 INFO L226 Difference]: Without dead ends: 64 [2019-10-13 17:43:40,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-13 17:43:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-13 17:43:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:43:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2019-10-13 17:43:40,619 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 44 [2019-10-13 17:43:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,620 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2019-10-13 17:43:40,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:43:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2019-10-13 17:43:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:43:40,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,624 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,839 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1331800891, now seen corresponding path program 8 times [2019-10-13 17:43:40,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892194254] [2019-10-13 17:43:40,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:40,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892194254] [2019-10-13 17:43:40,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742310207] [2019-10-13 17:43:40,967 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 [2019-10-13 17:43:41,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:41,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:41,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:43:41,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355091871] [2019-10-13 17:43:41,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:41,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:41,049 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 13 states. [2019-10-13 17:43:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,134 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-10-13 17:43:41,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:41,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-10-13 17:43:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,135 INFO L225 Difference]: With dead ends: 106 [2019-10-13 17:43:41,136 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:43:41,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:43:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-13 17:43:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:43:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2019-10-13 17:43:41,144 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 46 [2019-10-13 17:43:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,144 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2019-10-13 17:43:41,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2019-10-13 17:43:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 17:43:41,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,146 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,349 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash 97169629, now seen corresponding path program 9 times [2019-10-13 17:43:41,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657732085] [2019-10-13 17:43:41,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657732085] [2019-10-13 17:43:41,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704631276] [2019-10-13 17:43:41,470 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 [2019-10-13 17:43:41,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:43:41,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:41,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,716 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:41,717 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2019-10-13 17:43:41,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:41,724 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:41,725 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:41,725 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-10-13 17:43:41,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 17:43:41,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-10-13 17:43:41,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994866552] [2019-10-13 17:43:41,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:41,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:41,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:41,783 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 23 states. [2019-10-13 17:43:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,515 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2019-10-13 17:43:42,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:43:42,516 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-10-13 17:43:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,518 INFO L225 Difference]: With dead ends: 124 [2019-10-13 17:43:42,518 INFO L226 Difference]: Without dead ends: 84 [2019-10-13 17:43:42,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:43:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-13 17:43:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2019-10-13 17:43:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-13 17:43:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2019-10-13 17:43:42,531 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 48 [2019-10-13 17:43:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,532 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2019-10-13 17:43:42,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2019-10-13 17:43:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:43:42,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,533 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,738 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1531389518, now seen corresponding path program 1 times [2019-10-13 17:43:42,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388858387] [2019-10-13 17:43:42,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 17:43:42,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388858387] [2019-10-13 17:43:42,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754256246] [2019-10-13 17:43:42,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:43:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:43,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 19 [2019-10-13 17:43:43,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212285655] [2019-10-13 17:43:43,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:43,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:43,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:43,032 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 19 states. [2019-10-13 17:43:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,211 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2019-10-13 17:43:43,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:43:43,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2019-10-13 17:43:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,214 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:43:43,214 INFO L226 Difference]: Without dead ends: 87 [2019-10-13 17:43:43,215 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-13 17:43:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2019-10-13 17:43:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:43:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2019-10-13 17:43:43,224 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 58 [2019-10-13 17:43:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,224 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2019-10-13 17:43:43,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2019-10-13 17:43:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:43:43,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,226 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,432 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash -193251271, now seen corresponding path program 2 times [2019-10-13 17:43:43,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817271282] [2019-10-13 17:43:43,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-13 17:43:43,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817271282] [2019-10-13 17:43:43,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082423088] [2019-10-13 17:43:43,545 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 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 [2019-10-13 17:43:43,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:43,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:43:43,780 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2019-10-13 17:43:43,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220015776] [2019-10-13 17:43:43,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:43:43,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:43:43,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:43,782 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 21 states. [2019-10-13 17:43:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,954 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2019-10-13 17:43:43,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:43,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2019-10-13 17:43:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,956 INFO L225 Difference]: With dead ends: 148 [2019-10-13 17:43:43,956 INFO L226 Difference]: Without dead ends: 95 [2019-10-13 17:43:43,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-13 17:43:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2019-10-13 17:43:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:43:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-10-13 17:43:43,972 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 63 [2019-10-13 17:43:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,972 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-10-13 17:43:43,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:43:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-10-13 17:43:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:43:43,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,974 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,179 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash -606693674, now seen corresponding path program 3 times [2019-10-13 17:43:44,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702664567] [2019-10-13 17:43:44,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 17:43:44,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702664567] [2019-10-13 17:43:44,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852579365] [2019-10-13 17:43:44,376 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-13 17:43:44,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:44,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 17:43:44,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,004 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:45,004 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2019-10-13 17:43:45,006 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:45,009 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:45,009 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:45,009 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:3 [2019-10-13 17:43:45,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-10-13 17:43:45,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2019-10-13 17:43:45,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866598167] [2019-10-13 17:43:45,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:43:45,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:43:45,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:43:45,104 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 33 states. [2019-10-13 17:44:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:05,284 INFO L93 Difference]: Finished difference Result 187 states and 230 transitions. [2019-10-13 17:44:05,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-13 17:44:05,285 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2019-10-13 17:44:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:05,287 INFO L225 Difference]: With dead ends: 187 [2019-10-13 17:44:05,287 INFO L226 Difference]: Without dead ends: 128 [2019-10-13 17:44:05,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=511, Invalid=3521, Unknown=0, NotChecked=0, Total=4032 [2019-10-13 17:44:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-13 17:44:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2019-10-13 17:44:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-13 17:44:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2019-10-13 17:44:05,299 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 68 [2019-10-13 17:44:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:05,299 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2019-10-13 17:44:05,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:44:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2019-10-13 17:44:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:44:05,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:05,300 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:05,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:05,504 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1776234069, now seen corresponding path program 4 times [2019-10-13 17:44:05,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:05,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483345905] [2019-10-13 17:44:05,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:05,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:05,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:44:05,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483345905] [2019-10-13 17:44:05,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221043945] [2019-10-13 17:44:05,771 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:05,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:05,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:05,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:44:05,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-13 17:44:05,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:05,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:44:05,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151630670] [2019-10-13 17:44:05,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:44:05,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:44:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:44:05,911 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 18 states. [2019-10-13 17:44:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:06,036 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2019-10-13 17:44:06,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:44:06,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-10-13 17:44:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:06,039 INFO L225 Difference]: With dead ends: 170 [2019-10-13 17:44:06,039 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:44:06,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:44:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:44:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-10-13 17:44:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-13 17:44:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2019-10-13 17:44:06,051 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 78 [2019-10-13 17:44:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:06,053 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2019-10-13 17:44:06,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:44:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2019-10-13 17:44:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 17:44:06,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:06,054 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:06,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:06,259 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1102761805, now seen corresponding path program 5 times [2019-10-13 17:44:06,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:06,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775789531] [2019-10-13 17:44:06,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:06,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:06,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:44:06,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775789531] [2019-10-13 17:44:06,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402079019] [2019-10-13 17:44:06,508 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:06,639 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-10-13 17:44:06,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:06,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:44:06,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-10-13 17:44:06,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:06,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-10-13 17:44:06,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263532647] [2019-10-13 17:44:06,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:44:06,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:44:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:44:06,742 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 25 states. [2019-10-13 17:44:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:06,927 INFO L93 Difference]: Finished difference Result 182 states and 220 transitions. [2019-10-13 17:44:06,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:44:06,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2019-10-13 17:44:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:06,929 INFO L225 Difference]: With dead ends: 182 [2019-10-13 17:44:06,929 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:44:06,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:44:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:44:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2019-10-13 17:44:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-13 17:44:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2019-10-13 17:44:06,936 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 80 [2019-10-13 17:44:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:06,937 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2019-10-13 17:44:06,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:44:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2019-10-13 17:44:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:44:06,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:06,938 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:07,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:07,143 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2131195780, now seen corresponding path program 6 times [2019-10-13 17:44:07,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:07,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931794986] [2019-10-13 17:44:07,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:07,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:07,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 17:44:07,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931794986] [2019-10-13 17:44:07,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331897836] [2019-10-13 17:44:07,336 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:07,556 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 17:44:07,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:07,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:44:07,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 17:44:07,606 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:07,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:44:07,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094536896] [2019-10-13 17:44:07,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:44:07,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:44:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:44:07,609 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 20 states. [2019-10-13 17:44:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:07,767 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2019-10-13 17:44:07,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:44:07,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2019-10-13 17:44:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:07,770 INFO L225 Difference]: With dead ends: 186 [2019-10-13 17:44:07,770 INFO L226 Difference]: Without dead ends: 113 [2019-10-13 17:44:07,771 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:44:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-13 17:44:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-13 17:44:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-13 17:44:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2019-10-13 17:44:07,779 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 85 [2019-10-13 17:44:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:07,780 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2019-10-13 17:44:07,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:44:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2019-10-13 17:44:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:44:07,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:07,781 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:07,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:07,986 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1960493150, now seen corresponding path program 7 times [2019-10-13 17:44:07,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:07,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034634946] [2019-10-13 17:44:07,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:07,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:07,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 17:44:08,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034634946] [2019-10-13 17:44:08,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52095187] [2019-10-13 17:44:08,282 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:44:08,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 17:44:08,377 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:08,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:44:08,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056018864] [2019-10-13 17:44:08,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:44:08,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:44:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:44:08,378 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 21 states. [2019-10-13 17:44:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:08,542 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2019-10-13 17:44:08,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:44:08,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-10-13 17:44:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:08,543 INFO L225 Difference]: With dead ends: 188 [2019-10-13 17:44:08,544 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:44:08,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:44:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:44:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-13 17:44:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:44:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2019-10-13 17:44:08,553 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 87 [2019-10-13 17:44:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:08,553 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2019-10-13 17:44:08,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:44:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2019-10-13 17:44:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 17:44:08,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:08,555 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:08,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:08,759 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 116488256, now seen corresponding path program 8 times [2019-10-13 17:44:08,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:08,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92568297] [2019-10-13 17:44:08,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 17:44:08,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92568297] [2019-10-13 17:44:08,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225373500] [2019-10-13 17:44:08,998 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:44:09,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:09,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:44:09,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 17:44:09,104 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:09,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:44:09,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613118974] [2019-10-13 17:44:09,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:44:09,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:44:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:44:09,107 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 22 states. [2019-10-13 17:44:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:09,287 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2019-10-13 17:44:09,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:44:09,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-10-13 17:44:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:09,289 INFO L225 Difference]: With dead ends: 190 [2019-10-13 17:44:09,289 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:44:09,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:44:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:44:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-10-13 17:44:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-13 17:44:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2019-10-13 17:44:09,297 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 89 [2019-10-13 17:44:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:09,297 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2019-10-13 17:44:09,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:44:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2019-10-13 17:44:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 17:44:09,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:09,299 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:09,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,502 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1064173218, now seen corresponding path program 9 times [2019-10-13 17:44:09,503 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:09,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201947575] [2019-10-13 17:44:09,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 17:44:09,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201947575] [2019-10-13 17:44:09,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172478115] [2019-10-13 17:44:09,794 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:44:09,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:09,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:44:09,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2019-10-13 17:44:10,028 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:10,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-13 17:44:10,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534417860] [2019-10-13 17:44:10,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:44:10,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:44:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:44:10,030 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 30 states. [2019-10-13 17:44:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:10,285 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2019-10-13 17:44:10,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:44:10,287 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 91 [2019-10-13 17:44:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:10,288 INFO L225 Difference]: With dead ends: 202 [2019-10-13 17:44:10,288 INFO L226 Difference]: Without dead ends: 129 [2019-10-13 17:44:10,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:44:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-13 17:44:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2019-10-13 17:44:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 17:44:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2019-10-13 17:44:10,296 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 91 [2019-10-13 17:44:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:10,296 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2019-10-13 17:44:10,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:44:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2019-10-13 17:44:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 17:44:10,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:10,298 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:10,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:10,501 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash -561774121, now seen corresponding path program 10 times [2019-10-13 17:44:10,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:10,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216296864] [2019-10-13 17:44:10,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:10,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:10,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 17:44:10,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216296864] [2019-10-13 17:44:10,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574646239] [2019-10-13 17:44:10,777 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:10,857 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:10,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:10,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:44:10,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-13 17:44:10,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:10,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:44:10,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053338367] [2019-10-13 17:44:10,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:44:10,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:44:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:44:10,889 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 24 states. [2019-10-13 17:44:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:11,104 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2019-10-13 17:44:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:44:11,104 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2019-10-13 17:44:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:11,105 INFO L225 Difference]: With dead ends: 206 [2019-10-13 17:44:11,106 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:44:11,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:44:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:44:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-10-13 17:44:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 17:44:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2019-10-13 17:44:11,114 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 96 [2019-10-13 17:44:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:11,114 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2019-10-13 17:44:11,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:44:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2019-10-13 17:44:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:44:11,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:11,116 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:11,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:11,320 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1102406919, now seen corresponding path program 11 times [2019-10-13 17:44:11,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:11,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964449068] [2019-10-13 17:44:11,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 17:44:11,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964449068] [2019-10-13 17:44:11,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213454806] [2019-10-13 17:44:11,584 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:11,815 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-13 17:44:11,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:11,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:44:11,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-10-13 17:44:11,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:11,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2019-10-13 17:44:11,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216253454] [2019-10-13 17:44:11,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:44:11,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:11,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:44:11,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=747, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:11,954 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 33 states. [2019-10-13 17:44:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:12,218 INFO L93 Difference]: Finished difference Result 218 states and 264 transitions. [2019-10-13 17:44:12,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:44:12,219 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 98 [2019-10-13 17:44:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:12,220 INFO L225 Difference]: With dead ends: 218 [2019-10-13 17:44:12,221 INFO L226 Difference]: Without dead ends: 139 [2019-10-13 17:44:12,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=747, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-13 17:44:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2019-10-13 17:44:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-13 17:44:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2019-10-13 17:44:12,229 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 98 [2019-10-13 17:44:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:12,229 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2019-10-13 17:44:12,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:44:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2019-10-13 17:44:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 17:44:12,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:12,231 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:12,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:12,435 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1047097128, now seen corresponding path program 12 times [2019-10-13 17:44:12,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:12,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595703232] [2019-10-13 17:44:12,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:12,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:12,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-10-13 17:44:12,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595703232] [2019-10-13 17:44:12,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189567446] [2019-10-13 17:44:12,748 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:13,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 17:44:13,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:13,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-13 17:44:13,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:14,117 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:44:14,117 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2019-10-13 17:44:14,118 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:44:14,125 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:44:14,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:44:14,126 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:3 [2019-10-13 17:44:14,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:44:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 3 proven. 73 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2019-10-13 17:44:14,226 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:14,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2019-10-13 17:44:14,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807891007] [2019-10-13 17:44:14,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-13 17:44:14,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-13 17:44:14,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1542, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:44:14,227 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand 44 states.