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_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:59,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:59,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:59,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:59,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:59,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:59,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:59,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:59,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:59,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:59,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:59,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:59,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:59,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:59,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:59,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:59,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:59,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:59,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:59,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:59,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:59,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:59,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:59,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:59,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:59,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:59,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:59,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:59,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:59,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:59,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:59,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:59,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:59,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:59,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:59,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:59,912 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 21:45:59,927 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:59,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:59,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:59,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:59,930 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:59,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:59,931 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:59,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:59,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:59,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:59,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:59,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:59,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:59,932 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:59,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:59,933 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:59,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:59,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:59,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:59,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:59,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:59,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:59,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:59,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:59,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:59,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:59,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:59,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:59,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:00,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:00,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:00,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:00,246 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:00,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:00,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-14 21:46:00,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da019dbb4/3c80be00f33e4f44b3f44a5bfc34cd4f/FLAG8d107a7a2 [2019-10-14 21:46:00,839 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:00,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-14 21:46:00,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da019dbb4/3c80be00f33e4f44b3f44a5bfc34cd4f/FLAG8d107a7a2 [2019-10-14 21:46:01,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da019dbb4/3c80be00f33e4f44b3f44a5bfc34cd4f [2019-10-14 21:46:01,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:01,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:01,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:01,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:01,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:01,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba71078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01, skipping insertion in model container [2019-10-14 21:46:01,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,227 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:01,248 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:01,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:01,434 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:01,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:01,588 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:01,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01 WrapperNode [2019-10-14 21:46:01,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:01,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:01,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:01,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:01,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (1/1) ... [2019-10-14 21:46:01,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:01,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:01,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:01,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:01,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (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 21:46:01,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:01,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:01,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:01,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:01,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:01,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:01,987 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:01,988 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:46:01,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:01 BoogieIcfgContainer [2019-10-14 21:46:01,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:01,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:01,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:01,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:01" (1/3) ... [2019-10-14 21:46:01,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a54f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:01, skipping insertion in model container [2019-10-14 21:46:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:01" (2/3) ... [2019-10-14 21:46:01,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a54f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:01, skipping insertion in model container [2019-10-14 21:46:01,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:01" (3/3) ... [2019-10-14 21:46:01,995 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2019-10-14 21:46:02,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:02,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:02,016 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:02,041 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:02,041 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:02,041 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:02,042 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:02,042 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:02,042 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:02,042 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:02,042 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-14 21:46:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:02,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,071 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:02,074 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -825680561, now seen corresponding path program 1 times [2019-10-14 21:46:02,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:02,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542536865] [2019-10-14 21:46:02,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,260 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 21:46:02,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542536865] [2019-10-14 21:46:02,262 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:02,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:02,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465257412] [2019-10-14 21:46:02,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:02,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:02,281 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-10-14 21:46:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:02,421 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2019-10-14 21:46:02,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:02,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:02,434 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:46:02,434 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:46:02,438 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 21:46:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:46:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 21:46:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-10-14 21:46:02,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-10-14 21:46:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:02,485 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-14 21:46:02,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-10-14 21:46:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:02,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,487 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:02,487 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1876449348, now seen corresponding path program 1 times [2019-10-14 21:46:02,488 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:02,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727788605] [2019-10-14 21:46:02,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,568 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 21:46:02,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727788605] [2019-10-14 21:46:02,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:02,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:02,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784523001] [2019-10-14 21:46:02,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:02,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:02,573 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2019-10-14 21:46:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:02,701 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-14 21:46:02,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:02,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:02,703 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:46:02,703 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:46:02,705 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 21:46:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:46:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-10-14 21:46:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:46:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-14 21:46:02,720 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2019-10-14 21:46:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:02,722 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-14 21:46:02,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-14 21:46:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:46:02,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,727 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:02,729 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash -684235798, now seen corresponding path program 1 times [2019-10-14 21:46:02,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:02,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937591775] [2019-10-14 21:46:02,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:02,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937591775] [2019-10-14 21:46:02,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424395169] [2019-10-14 21:46:02,847 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 21:46:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:02,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:02,983 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:02,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:02,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508482817] [2019-10-14 21:46:02,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:02,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:02,986 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2019-10-14 21:46:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:03,123 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-14 21:46:03,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:03,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-14 21:46:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:03,125 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:46:03,126 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:46:03,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 21:46:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:46:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-10-14 21:46:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:46:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-14 21:46:03,134 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2019-10-14 21:46:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:03,135 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-14 21:46:03,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-14 21:46:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:46:03,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:03,136 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:03,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,340 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1590841348, now seen corresponding path program 2 times [2019-10-14 21:46:03,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:03,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480794495] [2019-10-14 21:46:03,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:03,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480794495] [2019-10-14 21:46:03,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977508526] [2019-10-14 21:46:03,496 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 21:46:03,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:03,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:03,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:03,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:03,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:03,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:03,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836263550] [2019-10-14 21:46:03,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:03,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:03,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:03,586 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2019-10-14 21:46:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:03,703 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-14 21:46:03,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:03,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-14 21:46:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:03,705 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:46:03,705 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:46:03,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 21:46:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:46:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-14 21:46:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:46:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2019-10-14 21:46:03,714 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2019-10-14 21:46:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:03,714 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2019-10-14 21:46:03,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2019-10-14 21:46:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:46:03,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:03,716 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:03,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,919 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1802172202, now seen corresponding path program 3 times [2019-10-14 21:46:03,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:03,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893688841] [2019-10-14 21:46:03,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:46:04,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893688841] [2019-10-14 21:46:04,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757367727] [2019-10-14 21:46:04,045 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 21:46:04,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:46:04,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:04,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:04,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:46:04,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:04,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:04,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190349125] [2019-10-14 21:46:04,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:04,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:04,154 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 8 states. [2019-10-14 21:46:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:04,320 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2019-10-14 21:46:04,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:04,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-14 21:46:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:04,322 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:46:04,322 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:46:04,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 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 21:46:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:46:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-10-14 21:46:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:46:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-10-14 21:46:04,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 33 [2019-10-14 21:46:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:04,338 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-10-14 21:46:04,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-10-14 21:46:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:46:04,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:04,344 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:04,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:04,549 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1613342780, now seen corresponding path program 4 times [2019-10-14 21:46:04,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:04,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224585088] [2019-10-14 21:46:04,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:04,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:04,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:46:04,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224585088] [2019-10-14 21:46:04,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424282219] [2019-10-14 21:46:04,653 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 21:46:04,752 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:04,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:04,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:04,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:46:04,778 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:04,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:04,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736272944] [2019-10-14 21:46:04,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:04,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:04,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:04,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:04,780 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 9 states. [2019-10-14 21:46:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:04,930 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2019-10-14 21:46:04,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:04,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-10-14 21:46:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:04,932 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:46:04,932 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:46:04,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 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 21:46:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:46:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2019-10-14 21:46:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:46:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2019-10-14 21:46:04,942 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 39 [2019-10-14 21:46:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:04,942 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2019-10-14 21:46:04,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2019-10-14 21:46:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:46:04,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:04,944 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:05,157 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash 306051690, now seen corresponding path program 5 times [2019-10-14 21:46:05,158 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878767089] [2019-10-14 21:46:05,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:05,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878767089] [2019-10-14 21:46:05,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247714338] [2019-10-14 21:46:05,311 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 21:46:05,595 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:46:05,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:05,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:05,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:05,619 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:05,619 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:05,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280819744] [2019-10-14 21:46:05,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:05,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:05,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:05,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:05,622 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 10 states. [2019-10-14 21:46:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,798 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2019-10-14 21:46:05,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:05,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-10-14 21:46:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,800 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:46:05,801 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:46:05,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 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 21:46:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:46:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-10-14 21:46:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:46:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-10-14 21:46:05,817 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 45 [2019-10-14 21:46:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,820 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-10-14 21:46:05,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-10-14 21:46:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:46:05,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,822 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,029 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 835219332, now seen corresponding path program 6 times [2019-10-14 21:46:06,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928606495] [2019-10-14 21:46:06,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:06,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928606495] [2019-10-14 21:46:06,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056347555] [2019-10-14 21:46:06,186 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 21:46:06,484 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:46:06,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:06,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:06,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:06,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:06,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:46:06,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354912190] [2019-10-14 21:46:06,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:06,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:06,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:06,516 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 11 states. [2019-10-14 21:46:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,675 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2019-10-14 21:46:06,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:06,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-14 21:46:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,676 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:46:06,677 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:46:06,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 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 21:46:06,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:46:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-10-14 21:46:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:46:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-10-14 21:46:06,685 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2019-10-14 21:46:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,686 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-10-14 21:46:06,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-10-14 21:46:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:46:06,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,687 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,893 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash -653496918, now seen corresponding path program 7 times [2019-10-14 21:46:06,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060822820] [2019-10-14 21:46:06,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:07,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060822820] [2019-10-14 21:46:07,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263836452] [2019-10-14 21:46:07,033 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 21:46:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:46:07,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:07,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039107476] [2019-10-14 21:46:07,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:07,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:07,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:07,138 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2019-10-14 21:46:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,315 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2019-10-14 21:46:07,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:07,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-14 21:46:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,318 INFO L225 Difference]: With dead ends: 116 [2019-10-14 21:46:07,319 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 21:46:07,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 21:46:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-10-14 21:46:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:46:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-10-14 21:46:07,328 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 57 [2019-10-14 21:46:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,328 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-10-14 21:46:07,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-10-14 21:46:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:46:07,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,330 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:07,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,536 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash -796092604, now seen corresponding path program 8 times [2019-10-14 21:46:07,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:07,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190338298] [2019-10-14 21:46:07,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:07,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:07,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190338298] [2019-10-14 21:46:07,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779802310] [2019-10-14 21:46:07,681 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 21:46:07,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:07,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:07,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:07,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094657486] [2019-10-14 21:46:07,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:07,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:07,815 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 13 states. [2019-10-14 21:46:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:08,043 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2019-10-14 21:46:08,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:08,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-10-14 21:46:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:08,045 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:46:08,045 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:46:08,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 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 21:46:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:46:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2019-10-14 21:46:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:46:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2019-10-14 21:46:08,068 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 63 [2019-10-14 21:46:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:08,072 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2019-10-14 21:46:08,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2019-10-14 21:46:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:46:08,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:08,074 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:08,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:08,283 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash -802008854, now seen corresponding path program 9 times [2019-10-14 21:46:08,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:08,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904912621] [2019-10-14 21:46:08,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:08,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:46:08,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904912621] [2019-10-14 21:46:08,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571064489] [2019-10-14 21:46:08,447 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 21:46:09,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:46:09,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:09,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:46:09,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 25 proven. 117 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:46:09,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:09,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2019-10-14 21:46:09,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517044685] [2019-10-14 21:46:09,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:09,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:09,287 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 16 states. [2019-10-14 21:46:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:09,502 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2019-10-14 21:46:09,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:09,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-10-14 21:46:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:09,504 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:46:09,504 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:46:09,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:46:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-14 21:46:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:46:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2019-10-14 21:46:09,513 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 69 [2019-10-14 21:46:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:09,513 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2019-10-14 21:46:09,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2019-10-14 21:46:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:46:09,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:09,515 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:09,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:09,730 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash -888429526, now seen corresponding path program 10 times [2019-10-14 21:46:09,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:09,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892816126] [2019-10-14 21:46:09,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:09,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:46:09,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892816126] [2019-10-14 21:46:09,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580165123] [2019-10-14 21:46:09,911 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 21:46:10,910 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:10,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:10,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:46:10,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:10,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:10,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477811503] [2019-10-14 21:46:10,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:10,964 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:10,965 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 16 states. [2019-10-14 21:46:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:11,219 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2019-10-14 21:46:11,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:11,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-10-14 21:46:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:11,221 INFO L225 Difference]: With dead ends: 152 [2019-10-14 21:46:11,221 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:46:11,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 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 21:46:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:46:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2019-10-14 21:46:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:46:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2019-10-14 21:46:11,229 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 81 [2019-10-14 21:46:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:11,229 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2019-10-14 21:46:11,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2019-10-14 21:46:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:46:11,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:11,231 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:11,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,437 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1427838660, now seen corresponding path program 11 times [2019-10-14 21:46:11,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:11,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509365518] [2019-10-14 21:46:11,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:46:11,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509365518] [2019-10-14 21:46:11,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418427446] [2019-10-14 21:46:11,620 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