java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:22,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:22,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:22,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:22,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:22,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:22,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:22,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:22,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:22,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:22,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:22,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:22,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:22,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:22,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:22,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:22,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:22,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:22,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:22,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:22,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:22,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:22,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:22,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:22,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:44:22,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:22,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:22,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:22,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:22,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:22,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:22,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:22,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:22,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:22,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:22,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:22,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:22,858 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:22,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:22,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:22,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:22,860 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:22,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:22,860 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:22,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:22,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:22,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:22,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:22,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:22,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:22,862 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:22,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:22,862 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:22,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:22,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:22,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:22,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:22,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:22,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:22,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:22,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:22,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:22,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:22,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:22,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:22,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:23,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:23,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:23,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:23,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:23,148 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:23,148 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-14 21:44:23,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f13bd90/09bb8c94d5c748a2acda85c39ed1e9f2/FLAG6f2b55b91 [2019-10-14 21:44:23,615 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:23,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-10-14 21:44:23,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f13bd90/09bb8c94d5c748a2acda85c39ed1e9f2/FLAG6f2b55b91 [2019-10-14 21:44:24,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f13bd90/09bb8c94d5c748a2acda85c39ed1e9f2 [2019-10-14 21:44:24,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:24,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:24,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:24,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:24,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:24,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24, skipping insertion in model container [2019-10-14 21:44:24,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,052 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:24,069 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:24,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:24,232 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:24,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:24,267 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:24,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24 WrapperNode [2019-10-14 21:44:24,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:24,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:24,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:24,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:24,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... [2019-10-14 21:44:24,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:24,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:24,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:24,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:24,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:24,623 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:24,623 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:44:24,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:24 BoogieIcfgContainer [2019-10-14 21:44:24,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:24,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:24,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:24,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:24,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:24" (1/3) ... [2019-10-14 21:44:24,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599e2563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:24, skipping insertion in model container [2019-10-14 21:44:24,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:24" (2/3) ... [2019-10-14 21:44:24,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599e2563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:24, skipping insertion in model container [2019-10-14 21:44:24,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:24" (3/3) ... [2019-10-14 21:44:24,632 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2019-10-14 21:44:24,641 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:24,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:24,659 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:24,682 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:24,682 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:24,682 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:24,683 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:24,683 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:24,683 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:24,683 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:24,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-14 21:44:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:44:24,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:24,705 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:24,707 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:24,713 INFO L82 PathProgramCache]: Analyzing trace with hash -441053002, now seen corresponding path program 1 times [2019-10-14 21:44:24,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:24,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773330870] [2019-10-14 21:44:24,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:24,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773330870] [2019-10-14 21:44:24,877 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:24,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:24,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407521699] [2019-10-14 21:44:24,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:24,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:24,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:24,904 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-14 21:44:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,029 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-14 21:44:25,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:25,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-14 21:44:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,039 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:44:25,039 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 21:44:25,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 21:44:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 21:44:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 21:44:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 21:44:25,082 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-14 21:44:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,083 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 21:44:25,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 21:44:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:44:25,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,084 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 303899570, now seen corresponding path program 1 times [2019-10-14 21:44:25,086 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49464879] [2019-10-14 21:44:25,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49464879] [2019-10-14 21:44:25,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:25,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:25,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602718535] [2019-10-14 21:44:25,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:25,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:25,221 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-10-14 21:44:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,293 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-14 21:44:25,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:25,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-14 21:44:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,296 INFO L225 Difference]: With dead ends: 30 [2019-10-14 21:44:25,297 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:44:25,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:44:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:44:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:44:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-14 21:44:25,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-10-14 21:44:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,308 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-14 21:44:25,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-14 21:44:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:44:25,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,311 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,312 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1260126610, now seen corresponding path program 1 times [2019-10-14 21:44:25,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667517330] [2019-10-14 21:44:25,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667517330] [2019-10-14 21:44:25,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444358871] [2019-10-14 21:44:25,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:25,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349382151] [2019-10-14 21:44:25,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:25,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:25,534 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-10-14 21:44:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,596 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-10-14 21:44:25,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:25,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-14 21:44:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,597 INFO L225 Difference]: With dead ends: 31 [2019-10-14 21:44:25,597 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:44:25,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:44:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:44:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:44:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-14 21:44:25,603 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-14 21:44:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,604 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-14 21:44:25,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-14 21:44:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:44:25,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,605 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,808 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1794669362, now seen corresponding path program 2 times [2019-10-14 21:44:25,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680380290] [2019-10-14 21:44:25,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680380290] [2019-10-14 21:44:25,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556209810] [2019-10-14 21:44:25,876 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:25,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:25,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:25,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843840873] [2019-10-14 21:44:25,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:25,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:25,943 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2019-10-14 21:44:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,014 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-14 21:44:26,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:26,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-14 21:44:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,016 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:44:26,017 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:44:26,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:44:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:44:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:44:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 21:44:26,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2019-10-14 21:44:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,023 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 21:44:26,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 21:44:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:44:26,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,024 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:26,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,228 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2004063982, now seen corresponding path program 3 times [2019-10-14 21:44:26,229 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:26,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591293661] [2019-10-14 21:44:26,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591293661] [2019-10-14 21:44:26,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122609856] [2019-10-14 21:44:26,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:26,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:26,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:26,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:26,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:26,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892467578] [2019-10-14 21:44:26,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:26,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:26,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:26,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:26,399 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-10-14 21:44:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,450 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-14 21:44:26,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:26,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-10-14 21:44:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,451 INFO L225 Difference]: With dead ends: 33 [2019-10-14 21:44:26,451 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:44:26,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:44:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:44:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:44:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-14 21:44:26,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2019-10-14 21:44:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,457 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-14 21:44:26,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-14 21:44:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:44:26,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,458 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:26,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,663 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:26,664 INFO L82 PathProgramCache]: Analyzing trace with hash -94637390, now seen corresponding path program 4 times [2019-10-14 21:44:26,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:26,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098106605] [2019-10-14 21:44:26,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098106605] [2019-10-14 21:44:26,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828422602] [2019-10-14 21:44:26,749 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:26,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:26,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:26,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,809 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:26,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:26,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487441807] [2019-10-14 21:44:26,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:26,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:26,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:26,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:26,812 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-10-14 21:44:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,886 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-14 21:44:26,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:26,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-14 21:44:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,888 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:44:26,888 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:44:26,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:44:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:44:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:44:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-14 21:44:26,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2019-10-14 21:44:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,897 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-14 21:44:26,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-14 21:44:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:44:26,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,898 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:27,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,099 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash -729870482, now seen corresponding path program 5 times [2019-10-14 21:44:27,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:27,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329859102] [2019-10-14 21:44:27,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329859102] [2019-10-14 21:44:27,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769833002] [2019-10-14 21:44:27,204 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,240 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:44:27,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:27,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:44:27,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:27,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:44:27,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481682441] [2019-10-14 21:44:27,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:27,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:27,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:27,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:27,263 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-10-14 21:44:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:27,325 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-14 21:44:27,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:27,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-14 21:44:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:27,327 INFO L225 Difference]: With dead ends: 35 [2019-10-14 21:44:27,327 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:44:27,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:44:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:44:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:44:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-14 21:44:27,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2019-10-14 21:44:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:27,333 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-14 21:44:27,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-14 21:44:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:44:27,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:27,334 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:27,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,543 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:27,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1052740146, now seen corresponding path program 6 times [2019-10-14 21:44:27,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:27,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500893935] [2019-10-14 21:44:27,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500893935] [2019-10-14 21:44:27,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799309566] [2019-10-14 21:44:27,659 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:44:27,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:27,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:44:27,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:27,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:44:27,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899893751] [2019-10-14 21:44:27,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:44:27,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:44:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:27,728 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2019-10-14 21:44:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:27,793 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-14 21:44:27,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:27,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-10-14 21:44:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:27,795 INFO L225 Difference]: With dead ends: 36 [2019-10-14 21:44:27,795 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:44:27,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:44:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:44:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:44:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-14 21:44:27,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-10-14 21:44:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:27,801 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-14 21:44:27,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:44:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-14 21:44:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:44:27,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:27,802 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,003 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash 479094766, now seen corresponding path program 7 times [2019-10-14 21:44:28,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001472472] [2019-10-14 21:44:28,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001472472] [2019-10-14 21:44:28,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761621921] [2019-10-14 21:44:28,119 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:44:28,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193477910] [2019-10-14 21:44:28,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:28,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:28,210 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2019-10-14 21:44:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:28,301 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-10-14 21:44:28,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:44:28,302 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-10-14 21:44:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:28,302 INFO L225 Difference]: With dead ends: 37 [2019-10-14 21:44:28,302 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:44:28,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:44:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:44:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:44:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-14 21:44:28,307 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2019-10-14 21:44:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:28,308 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-14 21:44:28,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-14 21:44:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:44:28,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:28,309 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,517 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -124042830, now seen corresponding path program 8 times [2019-10-14 21:44:28,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465403544] [2019-10-14 21:44:28,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465403544] [2019-10-14 21:44:28,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83841957] [2019-10-14 21:44:28,642 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:28,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:28,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:44:28,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224585088] [2019-10-14 21:44:28,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:44:28,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:44:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:28,706 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-10-14 21:44:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:28,760 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-10-14 21:44:28,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:28,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-10-14 21:44:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:28,762 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:44:28,762 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:44:28,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:44:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:44:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:44:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-14 21:44:28,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2019-10-14 21:44:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:28,773 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-14 21:44:28,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:44:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-14 21:44:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:44:28,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:28,776 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,977 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1641439122, now seen corresponding path program 9 times [2019-10-14 21:44:28,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036872145] [2019-10-14 21:44:28,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036872145] [2019-10-14 21:44:29,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250375145] [2019-10-14 21:44:29,123 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:44:29,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:29,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:44:29,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,198 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:29,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:44:29,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507427737] [2019-10-14 21:44:29,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:44:29,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:29,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:44:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:29,200 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2019-10-14 21:44:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:29,263 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-14 21:44:29,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:44:29,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-10-14 21:44:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:29,266 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:44:29,266 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:44:29,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:44:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:44:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:44:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-10-14 21:44:29,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2019-10-14 21:44:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:29,271 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-10-14 21:44:29,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:44:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-10-14 21:44:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:44:29,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:29,272 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:29,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,473 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1436083918, now seen corresponding path program 10 times [2019-10-14 21:44:29,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:29,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346969775] [2019-10-14 21:44:29,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346969775] [2019-10-14 21:44:29,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791867998] [2019-10-14 21:44:29,606 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:29,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:29,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:44:29,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:29,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:44:29,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825673813] [2019-10-14 21:44:29,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:44:29,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:44:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:29,673 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2019-10-14 21:44:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:29,755 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-10-14 21:44:29,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:44:29,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-10-14 21:44:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:29,756 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:44:29,756 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:44:29,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:44:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 21:44:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:44:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-14 21:44:29,761 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2019-10-14 21:44:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:29,761 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-14 21:44:29,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:44:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-14 21:44:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:44:29,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:29,762 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:29,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,970 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 634960110, now seen corresponding path program 11 times [2019-10-14 21:44:29,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:29,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989602938] [2019-10-14 21:44:29,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989602938] [2019-10-14 21:44:30,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709537067] [2019-10-14 21:44:30,101 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,177 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:44:30,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:30,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:44:30,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,200 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:30,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:44:30,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827592318] [2019-10-14 21:44:30,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:44:30,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:44:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:30,202 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 16 states. [2019-10-14 21:44:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:30,275 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-14 21:44:30,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:44:30,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-10-14 21:44:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:30,276 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:44:30,277 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:44:30,277 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:44:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 21:44:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:44:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-10-14 21:44:30,282 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-10-14 21:44:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:30,282 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-10-14 21:44:30,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:44:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-10-14 21:44:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:44:30,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:30,283 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:30,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,491 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 412815538, now seen corresponding path program 12 times [2019-10-14 21:44:30,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:30,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725792401] [2019-10-14 21:44:30,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725792401] [2019-10-14 21:44:30,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653502583] [2019-10-14 21:44:30,657 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:44:30,714 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:44:30,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:30,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:44:30,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:30,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 21:44:30,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326378773] [2019-10-14 21:44:30,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:44:30,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:44:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:44:30,735 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2019-10-14 21:44:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:30,773 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-10-14 21:44:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:44:30,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2019-10-14 21:44:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:30,774 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:44:30,774 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:44:30,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:44:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:44:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:44:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:44:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-10-14 21:44:30,779 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2019-10-14 21:44:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:30,779 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-10-14 21:44:30,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:44:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-10-14 21:44:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:44:30,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:30,780 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:30,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,982 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2116268398, now seen corresponding path program 13 times [2019-10-14 21:44:30,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:30,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743917210] [2019-10-14 21:44:30,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743917210] [2019-10-14 21:44:31,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993081583] [2019-10-14 21:44:31,142 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:44:31,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:31,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:44:31,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811168275] [2019-10-14 21:44:31,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:44:31,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:44:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:31,207 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 18 states. [2019-10-14 21:44:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:31,301 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-10-14 21:44:31,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:44:31,302 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-10-14 21:44:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:31,302 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:44:31,303 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:44:31,304 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:44:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:44:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:44:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-14 21:44:31,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2019-10-14 21:44:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:31,308 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-14 21:44:31,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:44:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-14 21:44:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:44:31,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:31,309 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:31,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,512 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -911267790, now seen corresponding path program 14 times [2019-10-14 21:44:31,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:31,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115694365] [2019-10-14 21:44:31,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115694365] [2019-10-14 21:44:31,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957855770] [2019-10-14 21:44:31,678 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:31,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:31,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:44:31,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:31,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:44:31,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162890876] [2019-10-14 21:44:31,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:44:31,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:44:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:31,763 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 19 states. [2019-10-14 21:44:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:31,888 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-10-14 21:44:31,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:44:31,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2019-10-14 21:44:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:31,889 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:44:31,890 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:44:31,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:44:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:44:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:44:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-14 21:44:31,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2019-10-14 21:44:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:31,899 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-14 21:44:31,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:44:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-14 21:44:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:44:31,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:31,905 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:32,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:32,105 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash -275609106, now seen corresponding path program 15 times [2019-10-14 21:44:32,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:32,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082055565] [2019-10-14 21:44:32,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:32,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082055565] [2019-10-14 21:44:32,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472356302] [2019-10-14 21:44:32,320 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:32,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:44:32,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:32,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:44:32,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:32,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:32,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:44:32,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580165123] [2019-10-14 21:44:32,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:44:32,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:44:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:32,441 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2019-10-14 21:44:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:32,529 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-10-14 21:44:32,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:44:32,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-10-14 21:44:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:32,530 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:44:32,530 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:44:32,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:44:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:44:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:44:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-14 21:44:32,536 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2019-10-14 21:44:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:32,539 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-14 21:44:32,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:44:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-14 21:44:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:44:32,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:32,540 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:32,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:32,742 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2045026382, now seen corresponding path program 16 times [2019-10-14 21:44:32,743 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:32,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141651403] [2019-10-14 21:44:32,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:32,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141651403] [2019-10-14 21:44:32,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418559383] [2019-10-14 21:44:32,942 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,016 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:33,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:33,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:44:33,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:33,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:33,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:44:33,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591360909] [2019-10-14 21:44:33,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:44:33,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:44:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:33,051 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 21 states. [2019-10-14 21:44:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:33,179 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-10-14 21:44:33,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:44:33,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-10-14 21:44:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:33,181 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:44:33,181 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:44:33,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:44:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 21:44:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:44:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-14 21:44:33,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2019-10-14 21:44:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:33,193 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-14 21:44:33,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:44:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-14 21:44:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:44:33,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:33,197 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:33,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,398 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1062387090, now seen corresponding path program 17 times [2019-10-14 21:44:33,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:33,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715005495] [2019-10-14 21:44:33,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:33,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715005495] [2019-10-14 21:44:33,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004811272] [2019-10-14 21:44:33,613 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,705 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:44:33,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:33,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:44:33,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:33,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:33,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:44:33,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046742766] [2019-10-14 21:44:33,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:44:33,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:44:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:33,727 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2019-10-14 21:44:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:33,816 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-14 21:44:33,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:44:33,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-10-14 21:44:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:33,817 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:44:33,817 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:44:33,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:44:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:44:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:44:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-14 21:44:33,822 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2019-10-14 21:44:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:33,822 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-14 21:44:33,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:44:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-14 21:44:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:33,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:33,823 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:34,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:34,028 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash -665340110, now seen corresponding path program 18 times [2019-10-14 21:44:34,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:34,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967998610] [2019-10-14 21:44:34,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:34,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967998610] [2019-10-14 21:44:34,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980683174] [2019-10-14 21:44:34,255 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:34,417 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 21:44:34,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:34,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:44:34,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:34,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:34,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:44:34,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278356383] [2019-10-14 21:44:34,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:44:34,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:44:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:44:34,451 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 23 states. [2019-10-14 21:44:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:34,530 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-10-14 21:44:34,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:44:34,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2019-10-14 21:44:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:34,530 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:44:34,530 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:44:34,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:44:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:44:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:44:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:44:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-14 21:44:34,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-10-14 21:44:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:34,535 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-14 21:44:34,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:44:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-14 21:44:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:44:34,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:34,536 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:34,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:34,741 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1241785618, now seen corresponding path program 19 times [2019-10-14 21:44:34,741 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:34,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497742775] [2019-10-14 21:44:34,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:35,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497742775] [2019-10-14 21:44:35,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145841298] [2019-10-14 21:44:35,038 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:35,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:44:35,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:35,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:35,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:44:35,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85865293] [2019-10-14 21:44:35,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:44:35,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:44:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:35,118 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 24 states. [2019-10-14 21:44:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:35,200 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2019-10-14 21:44:35,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:44:35,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2019-10-14 21:44:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:35,201 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:44:35,201 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:44:35,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:44:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 21:44:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:44:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-14 21:44:35,205 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2019-10-14 21:44:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:35,206 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-14 21:44:35,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:44:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-14 21:44:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:35,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:35,207 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:35,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:35,414 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1931727182, now seen corresponding path program 20 times [2019-10-14 21:44:35,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:35,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227144305] [2019-10-14 21:44:35,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:35,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:35,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:35,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227144305] [2019-10-14 21:44:35,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269817009] [2019-10-14 21:44:35,695 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:35,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:35,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:35,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:44:35,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:35,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:35,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:44:35,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503302092] [2019-10-14 21:44:35,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:44:35,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:44:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:44:35,764 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-10-14 21:44:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:35,877 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-10-14 21:44:35,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:44:35,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-10-14 21:44:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:35,880 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:44:35,880 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:44:35,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:44:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:44:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 21:44:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:44:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-10-14 21:44:35,884 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2019-10-14 21:44:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:35,884 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-10-14 21:44:35,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:44:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-10-14 21:44:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:44:35,885 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:35,885 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:36,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:36,089 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:36,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1845079186, now seen corresponding path program 21 times [2019-10-14 21:44:36,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:36,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565450292] [2019-10-14 21:44:36,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:36,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:36,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:36,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565450292] [2019-10-14 21:44:36,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895204511] [2019-10-14 21:44:36,365 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:36,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:44:36,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:36,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:44:36,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:36,724 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:36,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:44:36,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678885901] [2019-10-14 21:44:36,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:44:36,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:44:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:44:36,726 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2019-10-14 21:44:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:36,830 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-10-14 21:44:36,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:44:36,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-10-14 21:44:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:36,831 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:44:36,831 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:44:36,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:44:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:44:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:44:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:44:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-10-14 21:44:36,836 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2019-10-14 21:44:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:36,836 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-10-14 21:44:36,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:44:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-10-14 21:44:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:44:36,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:36,837 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:37,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:37,042 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash 841008690, now seen corresponding path program 22 times [2019-10-14 21:44:37,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:37,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228958770] [2019-10-14 21:44:37,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:37,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228958770] [2019-10-14 21:44:37,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720453134] [2019-10-14 21:44:37,334 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:37,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:37,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:37,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:44:37,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:37,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:37,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:44:37,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417875904] [2019-10-14 21:44:37,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:44:37,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:44:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:44:37,422 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 27 states. [2019-10-14 21:44:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:37,554 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-10-14 21:44:37,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:44:37,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2019-10-14 21:44:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:37,555 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:44:37,555 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:44:37,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:44:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:44:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 21:44:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:44:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-14 21:44:37,561 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-10-14 21:44:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:37,561 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-14 21:44:37,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:44:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-14 21:44:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:44:37,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:37,562 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:37,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:37,766 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1789613074, now seen corresponding path program 23 times [2019-10-14 21:44:37,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:37,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276542853] [2019-10-14 21:44:37,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:38,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276542853] [2019-10-14 21:44:38,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009877296] [2019-10-14 21:44:38,117 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:38,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 21:44:38,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:38,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:44:38,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:38,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:38,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:44:38,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295581305] [2019-10-14 21:44:38,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:44:38,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:44:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:44:38,365 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 28 states. [2019-10-14 21:44:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:38,456 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-10-14 21:44:38,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:44:38,456 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2019-10-14 21:44:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:38,457 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:44:38,457 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:44:38,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:44:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:44:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 21:44:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:44:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-14 21:44:38,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2019-10-14 21:44:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:38,461 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-14 21:44:38,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:44:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-14 21:44:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:44:38,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:38,463 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:38,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:38,667 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1734509134, now seen corresponding path program 24 times [2019-10-14 21:44:38,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:38,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325462975] [2019-10-14 21:44:38,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:38,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:38,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:38,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325462975] [2019-10-14 21:44:38,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604901559] [2019-10-14 21:44:38,972 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:39,951 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:44:39,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:39,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:44:39,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:39,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:39,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:44:39,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624552080] [2019-10-14 21:44:39,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:44:39,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:44:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:44:39,983 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 29 states. [2019-10-14 21:44:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:40,101 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-10-14 21:44:40,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:44:40,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2019-10-14 21:44:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:40,102 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:44:40,102 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:44:40,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:44:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:44:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:44:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:44:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-10-14 21:44:40,108 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2019-10-14 21:44:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:40,109 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-10-14 21:44:40,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:44:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-10-14 21:44:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:44:40,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:40,109 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:40,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:40,315 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash -26286994, now seen corresponding path program 25 times [2019-10-14 21:44:40,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:40,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613118974] [2019-10-14 21:44:40,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:40,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:40,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:40,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613118974] [2019-10-14 21:44:40,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558651925] [2019-10-14 21:44:40,628 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:40,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:44:40,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:40,695 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:40,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:44:40,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930299798] [2019-10-14 21:44:40,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:44:40,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:44:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:44:40,696 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2019-10-14 21:44:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:40,847 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2019-10-14 21:44:40,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:44:40,847 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2019-10-14 21:44:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:40,848 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:44:40,848 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:44:40,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:44:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:44:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:44:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:44:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-14 21:44:40,852 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2019-10-14 21:44:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:40,852 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-14 21:44:40,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:44:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-14 21:44:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:44:40,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:40,853 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:41,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:41,057 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1388991794, now seen corresponding path program 26 times [2019-10-14 21:44:41,058 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:41,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291094208] [2019-10-14 21:44:41,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:41,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:41,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:41,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291094208] [2019-10-14 21:44:41,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859363899] [2019-10-14 21:44:41,438 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:41,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:41,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:41,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:44:41,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:41,527 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:41,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:44:41,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537475313] [2019-10-14 21:44:41,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:44:41,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:44:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:44:41,529 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 31 states. [2019-10-14 21:44:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:41,710 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-10-14 21:44:41,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:44:41,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-10-14 21:44:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:41,712 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:44:41,712 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:44:41,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:44:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:44:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 21:44:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:44:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-10-14 21:44:41,718 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2019-10-14 21:44:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:41,718 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-10-14 21:44:41,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:44:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-10-14 21:44:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:44:41,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:41,719 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:41,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:41,924 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006034, now seen corresponding path program 27 times [2019-10-14 21:44:41,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:41,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212567489] [2019-10-14 21:44:41,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:41,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:41,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:42,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212567489] [2019-10-14 21:44:42,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389859679] [2019-10-14 21:44:42,255 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:43,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 21:44:43,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:43,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:44:43,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:43,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:43,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 21:44:43,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39737109] [2019-10-14 21:44:43,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:44:43,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:44:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:44:43,280 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 32 states. [2019-10-14 21:44:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:43,435 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-10-14 21:44:43,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:44:43,435 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2019-10-14 21:44:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:43,436 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:44:43,436 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:44:43,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:44:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:44:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:44:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:44:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-14 21:44:43,439 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2019-10-14 21:44:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:43,439 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-14 21:44:43,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:44:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-14 21:44:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:44:43,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:43,440 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:43,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:43,646 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash 891243698, now seen corresponding path program 28 times [2019-10-14 21:44:43,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:43,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58837127] [2019-10-14 21:44:43,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:43,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:43,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:44,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58837127] [2019-10-14 21:44:44,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591922134] [2019-10-14 21:44:44,030 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:44,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:44,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:44,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:44:44,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:44,105 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:44,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:44:44,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930481156] [2019-10-14 21:44:44,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:44:44,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:44:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:44:44,107 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 33 states. [2019-10-14 21:44:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:44,245 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-10-14 21:44:44,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:44:44,245 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2019-10-14 21:44:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:44,246 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:44:44,246 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:44:44,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:44:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:44:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 21:44:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-14 21:44:44,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2019-10-14 21:44:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:44,250 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-14 21:44:44,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:44:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-14 21:44:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:44:44,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:44,251 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:44,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:44,452 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:44,453 INFO L82 PathProgramCache]: Analyzing trace with hash -232327826, now seen corresponding path program 29 times [2019-10-14 21:44:44,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:44,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888162758] [2019-10-14 21:44:44,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:44,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:44,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:44,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888162758] [2019-10-14 21:44:44,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166496251] [2019-10-14 21:44:44,873 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:45,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 21:44:45,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:45,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:44:45,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:45,634 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:45,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-14 21:44:45,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505429381] [2019-10-14 21:44:45,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:44:45,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:44:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:44:45,636 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 34 states. [2019-10-14 21:44:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:45,717 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-10-14 21:44:45,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:44:45,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2019-10-14 21:44:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:45,718 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:44:45,718 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:45,723 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:44:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:44:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:44:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-14 21:44:45,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2019-10-14 21:44:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:45,725 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-14 21:44:45,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:44:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-14 21:44:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:44:45,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:45,726 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:45,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:45,928 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash -703306702, now seen corresponding path program 30 times [2019-10-14 21:44:45,928 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:45,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674423896] [2019-10-14 21:44:45,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:45,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:45,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:46,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674423896] [2019-10-14 21:44:46,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705609207] [2019-10-14 21:44:46,348 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:48,829 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 21:44:48,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:48,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:44:48,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:48,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:48,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-14 21:44:48,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796705066] [2019-10-14 21:44:48,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:44:48,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:44:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:44:48,851 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 35 states. [2019-10-14 21:44:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:49,018 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-10-14 21:44:49,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:44:49,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-10-14 21:44:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:49,019 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:44:49,019 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:44:49,020 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:44:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:44:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 21:44:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:44:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-14 21:44:49,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2019-10-14 21:44:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:49,024 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-14 21:44:49,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:44:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-14 21:44:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:44:49,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:49,025 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:49,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:49,227 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1876217326, now seen corresponding path program 31 times [2019-10-14 21:44:49,228 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:49,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341430021] [2019-10-14 21:44:49,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:49,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:49,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:49,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341430021] [2019-10-14 21:44:49,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564108370] [2019-10-14 21:44:49,678 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:49,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:44:49,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:49,768 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:49,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:44:49,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917171310] [2019-10-14 21:44:49,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:44:49,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:44:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:44:49,773 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2019-10-14 21:44:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:49,830 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-10-14 21:44:49,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:44:49,830 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2019-10-14 21:44:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:49,831 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:44:49,831 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:44:49,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:44:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:44:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 21:44:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:44:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-14 21:44:49,834 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2019-10-14 21:44:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:49,835 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-14 21:44:49,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:44:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-14 21:44:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:44:49,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:49,836 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:50,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,040 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 237083570, now seen corresponding path program 32 times [2019-10-14 21:44:50,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:50,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767340728] [2019-10-14 21:44:50,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:50,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767340728] [2019-10-14 21:44:50,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668150074] [2019-10-14 21:44:50,573 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:50,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:50,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:44:50,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:50,664 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:50,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:44:50,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494695475] [2019-10-14 21:44:50,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:44:50,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:44:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:44:50,667 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 37 states. [2019-10-14 21:44:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:50,839 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-10-14 21:44:50,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:44:50,839 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2019-10-14 21:44:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:50,840 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:44:50,840 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:44:50,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:44:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:44:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 21:44:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:44:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-10-14 21:44:50,845 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2019-10-14 21:44:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:50,845 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-10-14 21:44:50,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:44:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-10-14 21:44:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:44:50,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:50,846 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:51,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:51,049 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:51,050 INFO L82 PathProgramCache]: Analyzing trace with hash 963544686, now seen corresponding path program 33 times [2019-10-14 21:44:51,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:51,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447445726] [2019-10-14 21:44:51,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:51,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:51,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:51,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447445726] [2019-10-14 21:44:51,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052049145] [2019-10-14 21:44:51,572 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:54,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 21:44:54,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:54,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:44:54,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:54,643 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:54,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-10-14 21:44:54,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533781518] [2019-10-14 21:44:54,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:44:54,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:44:54,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:44:54,645 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2019-10-14 21:44:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:54,808 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-10-14 21:44:54,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 21:44:54,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2019-10-14 21:44:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:54,809 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:44:54,809 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:44:54,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:44:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:44:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:44:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:44:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-10-14 21:44:54,813 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2019-10-14 21:44:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:54,814 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-10-14 21:44:54,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:44:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-10-14 21:44:54,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:44:54,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:54,815 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:55,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:55,022 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2009002802, now seen corresponding path program 34 times [2019-10-14 21:44:55,023 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:55,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744433176] [2019-10-14 21:44:55,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:55,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:55,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:55,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744433176] [2019-10-14 21:44:55,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941518882] [2019-10-14 21:44:55,548 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:55,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:55,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:55,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:44:55,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:55,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:55,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-14 21:44:55,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070576284] [2019-10-14 21:44:55,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:44:55,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:44:55,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:44:55,631 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 39 states. [2019-10-14 21:44:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:55,787 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2019-10-14 21:44:55,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:44:55,787 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2019-10-14 21:44:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:55,788 INFO L225 Difference]: With dead ends: 64 [2019-10-14 21:44:55,788 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:44:55,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:44:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:44:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:44:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:44:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-14 21:44:55,792 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2019-10-14 21:44:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:55,792 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-14 21:44:55,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:44:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-14 21:44:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:44:55,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:55,793 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:55,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:55,996 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash 58466030, now seen corresponding path program 35 times [2019-10-14 21:44:55,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:55,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579776174] [2019-10-14 21:44:55,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:55,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:55,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:56,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579776174] [2019-10-14 21:44:56,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122857566] [2019-10-14 21:44:56,727 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:57,253 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-14 21:44:57,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:57,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 21:44:57,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:57,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:57,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-10-14 21:44:57,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027851719] [2019-10-14 21:44:57,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:44:57,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:44:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:44:57,273 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 40 states. [2019-10-14 21:44:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:57,451 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2019-10-14 21:44:57,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:44:57,451 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2019-10-14 21:44:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:57,452 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:44:57,452 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:44:57,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:44:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:44:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-14 21:44:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:44:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-10-14 21:44:57,456 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2019-10-14 21:44:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:57,457 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-10-14 21:44:57,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:44:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-10-14 21:44:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:44:57,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:57,458 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:57,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:57,663 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash -278631758, now seen corresponding path program 36 times [2019-10-14 21:44:57,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:57,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977806147] [2019-10-14 21:44:57,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:57,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:57,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:58,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977806147] [2019-10-14 21:44:58,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905249205] [2019-10-14 21:44:58,274 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:06,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:45:06,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:06,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 21:45:06,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:06,973 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:06,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2019-10-14 21:45:06,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543748634] [2019-10-14 21:45:06,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:45:06,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:45:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:45:06,975 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 41 states. [2019-10-14 21:45:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:07,168 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2019-10-14 21:45:07,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:45:07,169 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2019-10-14 21:45:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,170 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:45:07,170 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:45:07,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:45:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:45:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-14 21:45:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:45:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-10-14 21:45:07,175 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2019-10-14 21:45:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,175 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-10-14 21:45:07,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 21:45:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-10-14 21:45:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:45:07,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,176 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:07,377 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2138728594, now seen corresponding path program 37 times [2019-10-14 21:45:07,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590844788] [2019-10-14 21:45:07,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:08,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590844788] [2019-10-14 21:45:08,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557783309] [2019-10-14 21:45:08,052 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:08,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2019-10-14 21:45:08,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766471090] [2019-10-14 21:45:08,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:45:08,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:45:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:45:08,149 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 42 states. [2019-10-14 21:45:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,352 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2019-10-14 21:45:08,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:45:08,352 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2019-10-14 21:45:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,353 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:45:08,353 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:08,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:45:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-14 21:45:08,357 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2019-10-14 21:45:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,357 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-14 21:45:08,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:45:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-14 21:45:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:08,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,357 INFO L380 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:08,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,558 INFO L410 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 327811634, now seen corresponding path program 38 times [2019-10-14 21:45:08,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:08,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19013772] [2019-10-14 21:45:08,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:09,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19013772] [2019-10-14 21:45:09,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405494223] [2019-10-14 21:45:09,525 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:09,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:09,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 21:45:09,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:09,677 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:09,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2019-10-14 21:45:09,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515115018] [2019-10-14 21:45:09,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 21:45:09,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:09,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 21:45:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:45:09,680 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 43 states. [2019-10-14 21:45:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:09,878 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2019-10-14 21:45:09,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:45:09,878 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2019-10-14 21:45:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:09,879 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:45:09,880 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:45:09,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:45:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:45:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-14 21:45:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:45:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-14 21:45:09,884 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2019-10-14 21:45:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:09,884 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-14 21:45:09,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-14 21:45:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-14 21:45:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:45:09,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:09,886 INFO L380 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:10,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:10,090 INFO L410 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash -518852626, now seen corresponding path program 39 times [2019-10-14 21:45:10,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:10,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632525882] [2019-10-14 21:45:10,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:11,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632525882] [2019-10-14 21:45:11,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779007659] [2019-10-14 21:45:11,083 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true