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-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:48:52,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:48:52,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:48:52,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:48:52,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:48:52,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:48:52,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:48:52,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:48:52,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:48:52,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:48:52,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:48:52,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:48:52,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:48:52,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:48:52,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:48:52,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:48:52,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:48:52,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:48:52,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:48:52,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:48:52,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:48:52,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:48:52,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:48:52,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:48:52,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:48:52,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:48:52,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:48:52,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:48:52,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:48:52,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:48:52,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:48:52,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:48:52,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:48:52,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:48:52,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:48:52,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:48:52,629 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 17:48:52,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:48:52,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:48:52,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:48:52,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:48:52,645 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:48:52,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:48:52,645 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:48:52,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:48:52,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:48:52,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:48:52,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:48:52,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:48:52,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:48:52,647 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:48:52,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:48:52,647 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:48:52,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:48:52,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:48:52,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:48:52,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:48:52,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:48:52,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:48:52,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:48:52,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:48:52,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:48:52,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:48:52,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:48:52,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:48:52,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:48:52,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:48:52,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:48:52,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:48:52,977 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:48:52,977 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:48:52,978 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-10-13 17:48:53,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df184f346/30db5903540f4ff1bca0a0174c6715b9/FLAGd850d5d00 [2019-10-13 17:48:53,555 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:48:53,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2019-10-13 17:48:53,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df184f346/30db5903540f4ff1bca0a0174c6715b9/FLAGd850d5d00 [2019-10-13 17:48:53,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df184f346/30db5903540f4ff1bca0a0174c6715b9 [2019-10-13 17:48:53,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:48:53,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:48:53,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:53,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:48:53,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:48:53,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:53" (1/1) ... [2019-10-13 17:48:53,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:53, skipping insertion in model container [2019-10-13 17:48:53,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:53" (1/1) ... [2019-10-13 17:48:53,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:48:53,974 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:48:54,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:54,258 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:48:54,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:54,410 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:48:54,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54 WrapperNode [2019-10-13 17:48:54,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:54,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:48:54,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:48:54,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:48:54,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (1/1) ... [2019-10-13 17:48:54,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:48:54,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:48:54,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:48:54,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:48:54,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (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 17:48:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:48:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:48:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:48:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2019-10-13 17:48:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2019-10-13 17:48:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:48:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:48:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:48:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:48:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:48:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:48:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:48:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:48:54,899 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:48:54,899 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 17:48:54,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:54 BoogieIcfgContainer [2019-10-13 17:48:54,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:48:54,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:48:54,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:48:54,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:48:54,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:48:53" (1/3) ... [2019-10-13 17:48:54,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f39786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:54, skipping insertion in model container [2019-10-13 17:48:54,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:54" (2/3) ... [2019-10-13 17:48:54,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f39786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:54, skipping insertion in model container [2019-10-13 17:48:54,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:54" (3/3) ... [2019-10-13 17:48:54,911 INFO L109 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2019-10-13 17:48:54,920 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:48:54,926 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:48:54,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:48:54,962 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:48:54,962 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:48:54,963 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:48:54,963 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:48:54,963 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:48:54,963 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:48:54,963 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:48:54,964 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:48:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2019-10-13 17:48:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:48:54,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:54,991 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 17:48:54,993 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:54,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1521704262, now seen corresponding path program 1 times [2019-10-13 17:48:55,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:55,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622707813] [2019-10-13 17:48:55,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,179 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 17:48:55,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622707813] [2019-10-13 17:48:55,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:55,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:48:55,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662536162] [2019-10-13 17:48:55,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:48:55,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:48:55,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:55,205 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2019-10-13 17:48:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:55,380 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2019-10-13 17:48:55,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:48:55,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 17:48:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:55,394 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:48:55,395 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:48:55,401 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 17:48:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:48:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 17:48:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:48:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-13 17:48:55,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2019-10-13 17:48:55,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:55,454 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-13 17:48:55,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:48:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-13 17:48:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:48:55,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:55,456 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 17:48:55,457 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1816604960, now seen corresponding path program 1 times [2019-10-13 17:48:55,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:55,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135882493] [2019-10-13 17:48:55,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,596 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 17:48:55,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135882493] [2019-10-13 17:48:55,597 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:55,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:55,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000704923] [2019-10-13 17:48:55,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:55,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:55,606 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-10-13 17:48:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:55,771 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2019-10-13 17:48:55,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:55,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:48:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:55,773 INFO L225 Difference]: With dead ends: 61 [2019-10-13 17:48:55,773 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:48:55,774 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 17:48:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:48:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 17:48:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:48:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2019-10-13 17:48:55,785 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2019-10-13 17:48:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:55,785 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2019-10-13 17:48:55,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2019-10-13 17:48:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:48:55,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:55,787 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] [2019-10-13 17:48:55,787 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1871306430, now seen corresponding path program 1 times [2019-10-13 17:48:55,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:55,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595333464] [2019-10-13 17:48:55,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:55,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595333464] [2019-10-13 17:48:55,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111112590] [2019-10-13 17:48:55,932 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 17:48:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:48:56,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:56,055 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 17:48:56,063 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:48:56,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-10-13 17:48:56,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769303151] [2019-10-13 17:48:56,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:56,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:56,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:56,066 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 4 states. [2019-10-13 17:48:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:56,147 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2019-10-13 17:48:56,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:56,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:48:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:56,151 INFO L225 Difference]: With dead ends: 94 [2019-10-13 17:48:56,151 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:48:56,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:48:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-13 17:48:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:48:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-13 17:48:56,171 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 22 [2019-10-13 17:48:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:56,171 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-13 17:48:56,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-13 17:48:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:48:56,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:56,174 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, 1] [2019-10-13 17:48:56,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:56,377 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1487912228, now seen corresponding path program 1 times [2019-10-13 17:48:56,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:56,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196947005] [2019-10-13 17:48:56,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:48:56,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196947005] [2019-10-13 17:48:56,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920195020] [2019-10-13 17:48:56,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:48:56,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:48:56,606 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:56,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-13 17:48:56,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385924710] [2019-10-13 17:48:56,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:48:56,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:48:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:48:56,608 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2019-10-13 17:48:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:56,966 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2019-10-13 17:48:56,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:48:56,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-13 17:48:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:56,969 INFO L225 Difference]: With dead ends: 130 [2019-10-13 17:48:56,969 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:48:56,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:48:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2019-10-13 17:48:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:48:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2019-10-13 17:48:56,981 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 24 [2019-10-13 17:48:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:56,981 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2019-10-13 17:48:56,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:48:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2019-10-13 17:48:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 17:48:56,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:56,983 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:57,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:57,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash 200624820, now seen corresponding path program 2 times [2019-10-13 17:48:57,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846896487] [2019-10-13 17:48:57,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:48:57,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846896487] [2019-10-13 17:48:57,249 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:57,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:57,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109509661] [2019-10-13 17:48:57,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:57,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:57,251 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2019-10-13 17:48:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:57,372 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2019-10-13 17:48:57,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:57,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-13 17:48:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:57,375 INFO L225 Difference]: With dead ends: 76 [2019-10-13 17:48:57,375 INFO L226 Difference]: Without dead ends: 57 [2019-10-13 17:48:57,376 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 17:48:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-13 17:48:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-13 17:48:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:48:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-13 17:48:57,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 29 [2019-10-13 17:48:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:57,385 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-13 17:48:57,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-13 17:48:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 17:48:57,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:57,387 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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 17:48:57,387 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -810492430, now seen corresponding path program 1 times [2019-10-13 17:48:57,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881093443] [2019-10-13 17:48:57,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:48:57,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881093443] [2019-10-13 17:48:57,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:57,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:57,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875391334] [2019-10-13 17:48:57,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:48:57,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:48:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:48:57,459 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2019-10-13 17:48:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:57,613 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-10-13 17:48:57,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:48:57,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-13 17:48:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:57,614 INFO L225 Difference]: With dead ends: 92 [2019-10-13 17:48:57,615 INFO L226 Difference]: Without dead ends: 64 [2019-10-13 17:48:57,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 17:48:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-13 17:48:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-10-13 17:48:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-13 17:48:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-10-13 17:48:57,623 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2019-10-13 17:48:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:57,624 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-10-13 17:48:57,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:48:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-10-13 17:48:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:48:57,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:57,625 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:57,626 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1051127576, now seen corresponding path program 1 times [2019-10-13 17:48:57,626 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646266723] [2019-10-13 17:48:57,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:48:57,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646266723] [2019-10-13 17:48:57,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:57,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:48:57,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124021283] [2019-10-13 17:48:57,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:48:57,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:48:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:48:57,706 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 5 states. [2019-10-13 17:48:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:57,827 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2019-10-13 17:48:57,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:48:57,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 17:48:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:57,828 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:48:57,829 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:48:57,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:48:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-13 17:48:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:48:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-13 17:48:57,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2019-10-13 17:48:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:57,837 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-13 17:48:57,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:48:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-13 17:48:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:48:57,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:57,839 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:57,839 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1308557857, now seen corresponding path program 1 times [2019-10-13 17:48:57,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135078752] [2019-10-13 17:48:57,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:48:57,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135078752] [2019-10-13 17:48:57,934 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:57,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:48:57,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136541509] [2019-10-13 17:48:57,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:48:57,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:48:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:57,936 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2019-10-13 17:48:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:58,088 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2019-10-13 17:48:58,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:48:58,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-10-13 17:48:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:58,091 INFO L225 Difference]: With dead ends: 120 [2019-10-13 17:48:58,091 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:48:58,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:48:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:48:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-10-13 17:48:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:48:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-10-13 17:48:58,101 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 39 [2019-10-13 17:48:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:58,102 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-10-13 17:48:58,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:48:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-10-13 17:48:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:48:58,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:58,104 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:58,105 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 998134748, now seen corresponding path program 1 times [2019-10-13 17:48:58,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:58,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428951370] [2019-10-13 17:48:58,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:48:58,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428951370] [2019-10-13 17:48:58,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564778279] [2019-10-13 17:48:58,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:48:58,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:48:58,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:58,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-13 17:48:58,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546655560] [2019-10-13 17:48:58,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:48:58,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:48:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:58,357 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 10 states. [2019-10-13 17:48:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:58,801 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2019-10-13 17:48:58,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:48:58,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2019-10-13 17:48:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:58,803 INFO L225 Difference]: With dead ends: 163 [2019-10-13 17:48:58,803 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:48:58,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:48:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:48:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2019-10-13 17:48:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:48:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2019-10-13 17:48:58,814 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 44 [2019-10-13 17:48:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:58,814 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2019-10-13 17:48:58,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:48:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2019-10-13 17:48:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:48:58,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:58,816 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:59,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:59,021 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2077043499, now seen corresponding path program 1 times [2019-10-13 17:48:59,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:59,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25709580] [2019-10-13 17:48:59,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:48:59,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25709580] [2019-10-13 17:48:59,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385752677] [2019-10-13 17:48:59,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:48:59,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:48:59,298 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:59,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-13 17:48:59,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196972542] [2019-10-13 17:48:59,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:48:59,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:48:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:48:59,300 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2019-10-13 17:48:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:59,699 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2019-10-13 17:48:59,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:48:59,700 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-10-13 17:48:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:59,702 INFO L225 Difference]: With dead ends: 173 [2019-10-13 17:48:59,702 INFO L226 Difference]: Without dead ends: 111 [2019-10-13 17:48:59,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:48:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-13 17:48:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2019-10-13 17:48:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:48:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-10-13 17:48:59,713 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 56 [2019-10-13 17:48:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:59,713 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-10-13 17:48:59,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:48:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-10-13 17:48:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:48:59,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:59,714 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:59,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:59,918 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -46575987, now seen corresponding path program 2 times [2019-10-13 17:48:59,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:59,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778102672] [2019-10-13 17:48:59,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:49:00,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778102672] [2019-10-13 17:49:00,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059823562] [2019-10-13 17:49:00,048 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 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 17:49:00,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:00,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:00,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:49:00,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:49:00,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:00,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-10-13 17:49:00,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643907744] [2019-10-13 17:49:00,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:49:00,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:49:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:49:00,206 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 15 states. [2019-10-13 17:49:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:00,556 INFO L93 Difference]: Finished difference Result 185 states and 216 transitions. [2019-10-13 17:49:00,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:49:00,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-10-13 17:49:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:00,558 INFO L225 Difference]: With dead ends: 185 [2019-10-13 17:49:00,558 INFO L226 Difference]: Without dead ends: 123 [2019-10-13 17:49:00,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:49:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-13 17:49:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 79. [2019-10-13 17:49:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:49:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-10-13 17:49:00,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 58 [2019-10-13 17:49:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:00,568 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-10-13 17:49:00,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:49:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-10-13 17:49:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:49:00,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:00,569 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:49:00,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:00,773 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:00,774 INFO L82 PathProgramCache]: Analyzing trace with hash -735436433, now seen corresponding path program 3 times [2019-10-13 17:49:00,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:00,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183952357] [2019-10-13 17:49:00,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:00,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:00,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:49:00,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183952357] [2019-10-13 17:49:00,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856603815] [2019-10-13 17:49:00,901 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 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 17:49:00,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:49:00,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:00,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:49:00,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:49:01,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:01,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-10-13 17:49:01,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675596874] [2019-10-13 17:49:01,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:49:01,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:49:01,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:49:01,048 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2019-10-13 17:49:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:01,645 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2019-10-13 17:49:01,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:49:01,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-10-13 17:49:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:01,648 INFO L225 Difference]: With dead ends: 214 [2019-10-13 17:49:01,648 INFO L226 Difference]: Without dead ends: 152 [2019-10-13 17:49:01,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:49:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-13 17:49:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-10-13 17:49:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:49:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-10-13 17:49:01,660 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 60 [2019-10-13 17:49:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:01,660 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-10-13 17:49:01,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:49:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-10-13 17:49:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 17:49:01,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:01,662 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 17:49:01,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:01,873 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1147184898, now seen corresponding path program 4 times [2019-10-13 17:49:01,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:01,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006499898] [2019-10-13 17:49:01,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 17:49:02,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006499898] [2019-10-13 17:49:02,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168364110] [2019-10-13 17:49:02,021 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 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 17:49:02,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:02,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:02,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:49:02,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:02,300 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-13 17:49:02,301 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:02,304 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:02,304 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 17:49:02,305 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-13 17:49:02,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:49:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 17:49:02,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:02,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-10-13 17:49:02,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193840986] [2019-10-13 17:49:02,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:49:02,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:49:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:49:02,367 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 17 states. [2019-10-13 17:49:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:03,384 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2019-10-13 17:49:03,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:49:03,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-10-13 17:49:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:03,386 INFO L225 Difference]: With dead ends: 150 [2019-10-13 17:49:03,386 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 17:49:03,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:49:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 17:49:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2019-10-13 17:49:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:49:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2019-10-13 17:49:03,399 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 72 [2019-10-13 17:49:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:03,400 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2019-10-13 17:49:03,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:49:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2019-10-13 17:49:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 17:49:03,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:03,402 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 17:49:03,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:03,605 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1991284329, now seen corresponding path program 1 times [2019-10-13 17:49:03,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:03,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140615053] [2019-10-13 17:49:03,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:03,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:03,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 17:49:03,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140615053] [2019-10-13 17:49:03,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545148479] [2019-10-13 17:49:03,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:49:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:49:03,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 17:49:03,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:03,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-10-13 17:49:03,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938870527] [2019-10-13 17:49:03,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:49:03,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:49:03,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:49:03,997 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 16 states. [2019-10-13 17:49:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:04,652 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2019-10-13 17:49:04,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:49:04,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2019-10-13 17:49:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:04,655 INFO L225 Difference]: With dead ends: 307 [2019-10-13 17:49:04,655 INFO L226 Difference]: Without dead ends: 219 [2019-10-13 17:49:04,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:49:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-10-13 17:49:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 119. [2019-10-13 17:49:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:49:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2019-10-13 17:49:04,680 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 83 [2019-10-13 17:49:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:04,680 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2019-10-13 17:49:04,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:49:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2019-10-13 17:49:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:49:04,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:04,682 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:49:04,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:04,887 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash -655094229, now seen corresponding path program 1 times [2019-10-13 17:49:04,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:04,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921689163] [2019-10-13 17:49:04,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 17:49:05,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921689163] [2019-10-13 17:49:05,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455746429] [2019-10-13 17:49:05,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:49:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:05,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:49:05,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:49:05,287 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:05,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2019-10-13 17:49:05,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416582908] [2019-10-13 17:49:05,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:49:05,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:49:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:49:05,289 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 18 states. [2019-10-13 17:49:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:05,963 INFO L93 Difference]: Finished difference Result 310 states and 380 transitions. [2019-10-13 17:49:05,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:49:05,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2019-10-13 17:49:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:05,966 INFO L225 Difference]: With dead ends: 310 [2019-10-13 17:49:05,966 INFO L226 Difference]: Without dead ends: 212 [2019-10-13 17:49:05,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:49:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-13 17:49:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 130. [2019-10-13 17:49:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-13 17:49:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2019-10-13 17:49:05,993 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 86 [2019-10-13 17:49:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:05,993 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2019-10-13 17:49:05,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:49:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2019-10-13 17:49:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:49:05,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:05,995 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:49:06,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:06,201 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1400710534, now seen corresponding path program 2 times [2019-10-13 17:49:06,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:06,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994807047] [2019-10-13 17:49:06,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-13 17:49:06,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994807047] [2019-10-13 17:49:06,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442396674] [2019-10-13 17:49:06,354 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 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 17:49:06,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:06,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:06,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:49:06,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-10-13 17:49:06,637 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:06,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2019-10-13 17:49:06,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192975616] [2019-10-13 17:49:06,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:49:06,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:06,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:49:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:49:06,638 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand 20 states. [2019-10-13 17:49:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:07,514 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2019-10-13 17:49:07,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:49:07,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 17:49:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:07,517 INFO L225 Difference]: With dead ends: 340 [2019-10-13 17:49:07,517 INFO L226 Difference]: Without dead ends: 233 [2019-10-13 17:49:07,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:49:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-10-13 17:49:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 141. [2019-10-13 17:49:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-13 17:49:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2019-10-13 17:49:07,539 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 98 [2019-10-13 17:49:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:07,539 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2019-10-13 17:49:07,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:49:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2019-10-13 17:49:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:49:07,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:07,543 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:49:07,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:07,747 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1323250423, now seen corresponding path program 3 times [2019-10-13 17:49:07,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:07,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402906208] [2019-10-13 17:49:07,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-13 17:49:07,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402906208] [2019-10-13 17:49:07,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216164666] [2019-10-13 17:49:07,928 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 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 17:49:08,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:49:08,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:08,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:49:08,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-10-13 17:49:08,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:08,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2019-10-13 17:49:08,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609844908] [2019-10-13 17:49:08,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:49:08,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:49:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:49:08,156 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand 19 states. [2019-10-13 17:49:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:09,195 INFO L93 Difference]: Finished difference Result 418 states and 522 transitions. [2019-10-13 17:49:09,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:49:09,195 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2019-10-13 17:49:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:09,198 INFO L225 Difference]: With dead ends: 418 [2019-10-13 17:49:09,198 INFO L226 Difference]: Without dead ends: 302 [2019-10-13 17:49:09,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=455, Invalid=1185, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:49:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-10-13 17:49:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 150. [2019-10-13 17:49:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-13 17:49:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2019-10-13 17:49:09,222 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 110 [2019-10-13 17:49:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:09,222 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2019-10-13 17:49:09,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:49:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2019-10-13 17:49:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 17:49:09,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:09,224 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 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 17:49:09,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:09,433 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2110925161, now seen corresponding path program 4 times [2019-10-13 17:49:09,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:09,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103329934] [2019-10-13 17:49:09,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-13 17:49:09,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103329934] [2019-10-13 17:49:09,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163895780] [2019-10-13 17:49:09,631 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 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 17:49:09,728 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:09,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:09,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:49:09,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:09,898 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:09,899 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:09,901 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:09,902 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:09,902 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2019-10-13 17:49:09,903 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:09,911 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:09,911 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:49:09,912 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-10-13 17:49:19,912 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 17:49:23,251 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2019-10-13 17:49:23,258 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:23,260 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:23,261 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:49:23,262 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:23,262 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 33 treesize of output 11 [2019-10-13 17:49:23,263 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:23,266 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:23,267 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:23,267 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:4 [2019-10-13 17:49:23,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:49:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 17:49:23,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:23,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-10-13 17:49:23,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124510125] [2019-10-13 17:49:23,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:49:23,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:49:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=638, Unknown=5, NotChecked=0, Total=756 [2019-10-13 17:49:23,380 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand 28 states.