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-multidimensional/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:39:05,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:39:05,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:39:05,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:39:05,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:39:05,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:39:05,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:39:05,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:39:05,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:39:05,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:39:05,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:39:05,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:39:05,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:39:05,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:39:05,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:39:05,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:39:05,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:39:05,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:39:05,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:39:05,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:39:05,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:39:05,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:39:05,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:39:05,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:39:05,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:39:06,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:39:06,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:39:06,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:39:06,013 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 [2019-09-07 12:39:06,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:39:06,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:39:06,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:39:06,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:39:06,039 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:39:06,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:39:06,040 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:39:06,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:39:06,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:39:06,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:39:06,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:39:06,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:39:06,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:39:06,042 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:39:06,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:39:06,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:39:06,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:39:06,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:39:06,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:39:06,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:39:06,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:39:06,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:39:06,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:39:06,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:39:06,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:39:06,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:39:06,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:39:06,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:39:06,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:39:06,093 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:39:06,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:39:06,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:39:06,108 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:39:06,109 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:39:06,110 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-09-07 12:39:06,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8286ac3/1296c33a672a416584c33e8d41087046/FLAG10148ca48 [2019-09-07 12:39:06,635 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:39:06,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-09-07 12:39:06,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8286ac3/1296c33a672a416584c33e8d41087046/FLAG10148ca48 [2019-09-07 12:39:07,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8286ac3/1296c33a672a416584c33e8d41087046 [2019-09-07 12:39:07,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:39:07,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:39:07,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:39:07,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:39:07,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:39:07,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e21a4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07, skipping insertion in model container [2019-09-07 12:39:07,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,042 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:39:07,059 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:39:07,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:39:07,222 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:39:07,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:39:07,350 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:39:07,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07 WrapperNode [2019-09-07 12:39:07,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:39:07,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:39:07,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:39:07,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:39:07,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (1/1) ... [2019-09-07 12:39:07,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:39:07,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:39:07,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:39:07,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:39:07,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (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 [2019-09-07 12:39:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:39:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:39:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 12:39:07,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:39:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:39:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:39:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:39:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:39:07,760 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:39:07,761 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-07 12:39:07,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:39:07 BoogieIcfgContainer [2019-09-07 12:39:07,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:39:07,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:39:07,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:39:07,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:39:07,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:39:07" (1/3) ... [2019-09-07 12:39:07,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f33ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:39:07, skipping insertion in model container [2019-09-07 12:39:07,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:39:07" (2/3) ... [2019-09-07 12:39:07,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f33ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:39:07, skipping insertion in model container [2019-09-07 12:39:07,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:39:07" (3/3) ... [2019-09-07 12:39:07,768 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-09-07 12:39:07,775 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:39:07,782 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:39:07,798 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:39:07,822 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:39:07,822 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:39:07,823 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:39:07,823 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:39:07,823 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:39:07,823 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:39:07,823 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:39:07,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:39:07,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:39:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 12:39:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 12:39:07,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:07,844 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:07,846 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:07,852 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-09-07 12:39:07,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:07,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:07,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:07,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:07,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:07,930 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:07,931 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:07,931 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:07,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:07,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:39:07,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:39:08,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:39:08,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:39:08,047 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:39:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:39:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:39:08,063 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-09-07 12:39:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:08,136 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-09-07 12:39:08,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:39:08,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 12:39:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:08,148 INFO L225 Difference]: With dead ends: 61 [2019-09-07 12:39:08,149 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 12:39:08,153 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:39:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 12:39:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-09-07 12:39:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 12:39:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-09-07 12:39:08,199 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-09-07 12:39:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:08,200 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-09-07 12:39:08,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:39:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-09-07 12:39:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 12:39:08,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:08,202 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:08,202 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-09-07 12:39:08,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:08,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:08,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,214 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:08,214 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:08,215 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:08,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:08,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:39:08,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:39:08,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:39:08,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:39:08,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:39:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:39:08,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:08,305 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-09-07 12:39:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:08,411 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-09-07 12:39:08,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:39:08,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-09-07 12:39:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:08,416 INFO L225 Difference]: With dead ends: 59 [2019-09-07 12:39:08,416 INFO L226 Difference]: Without dead ends: 38 [2019-09-07 12:39:08,417 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-07 12:39:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-09-07 12:39:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 12:39:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-09-07 12:39:08,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-09-07 12:39:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:08,444 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-09-07 12:39:08,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:39:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-09-07 12:39:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 12:39:08,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:08,448 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:08,448 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-09-07 12:39:08,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:08,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:08,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:08,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,470 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:08,470 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:08,470 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:08,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:08,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:39:08,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 12:39:08,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:08,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:39:08,579 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:39:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:39:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:39:08,580 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-09-07 12:39:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:08,711 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-09-07 12:39:08,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:39:08,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-07 12:39:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:08,713 INFO L225 Difference]: With dead ends: 69 [2019-09-07 12:39:08,713 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 12:39:08,715 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:39:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 12:39:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-09-07 12:39:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 12:39:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-09-07 12:39:08,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-09-07 12:39:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:08,734 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-09-07 12:39:08,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:39:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-09-07 12:39:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 12:39:08,735 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:08,736 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:08,736 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-09-07 12:39:08,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:08,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,745 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:08,745 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:08,745 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:08,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-07 12:39:08,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:08,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:39:08,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 12:39:08,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:39:08,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:39:08,841 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:39:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:39:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:08,842 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-09-07 12:39:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:08,943 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-09-07 12:39:08,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:39:08,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-09-07 12:39:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:08,944 INFO L225 Difference]: With dead ends: 76 [2019-09-07 12:39:08,945 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 12:39:08,945 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 12:39:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-09-07 12:39:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 12:39:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-09-07 12:39:08,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-09-07 12:39:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:08,964 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-09-07 12:39:08,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:39:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-09-07 12:39:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-07 12:39:08,967 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:08,967 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:08,967 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-09-07 12:39:08,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:08,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:08,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:08,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:08,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:08,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:08,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:08,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:09,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:39:09,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:39:09,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:09,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:39:09,080 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:39:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:39:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:39:09,081 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-09-07 12:39:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:09,195 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-09-07 12:39:09,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:39:09,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-09-07 12:39:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:09,197 INFO L225 Difference]: With dead ends: 83 [2019-09-07 12:39:09,197 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 12:39:09,198 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:39:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 12:39:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-09-07 12:39:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 12:39:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-09-07 12:39:09,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-09-07 12:39:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:09,207 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-09-07 12:39:09,208 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:39:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-09-07 12:39:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 12:39:09,209 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:09,209 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:09,209 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:09,210 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-09-07 12:39:09,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:09,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:09,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:09,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,220 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:09,224 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:09,224 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:09,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:39:09,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:39:09,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:09,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:39:09,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-07 12:39:09,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:09,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 12:39:09,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:39:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:39:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:39:09,346 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-09-07 12:39:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:09,471 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-09-07 12:39:09,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 12:39:09,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-09-07 12:39:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:09,472 INFO L225 Difference]: With dead ends: 97 [2019-09-07 12:39:09,473 INFO L226 Difference]: Without dead ends: 58 [2019-09-07 12:39:09,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:39:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-07 12:39:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-09-07 12:39:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-07 12:39:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-09-07 12:39:09,482 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-09-07 12:39:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:09,483 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-09-07 12:39:09,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:39:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-09-07 12:39:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-07 12:39:09,484 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:09,484 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:09,485 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-09-07 12:39:09,485 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:09,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:09,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:09,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:09,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:09,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:09,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:09,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:39:09,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:09,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:39:09,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-09-07 12:39:09,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:09,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 12:39:09,558 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:39:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:39:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:09,559 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-09-07 12:39:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:09,606 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-09-07 12:39:09,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:39:09,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-09-07 12:39:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:09,608 INFO L225 Difference]: With dead ends: 105 [2019-09-07 12:39:09,608 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 12:39:09,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:39:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 12:39:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-07 12:39:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-07 12:39:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-09-07 12:39:09,618 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-09-07 12:39:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:09,618 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-09-07 12:39:09,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:39:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-09-07 12:39:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 12:39:09,620 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:09,620 INFO L399 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:09,620 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-09-07 12:39:09,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:09,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:09,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:09,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:09,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:09,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:09,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:09,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:09,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:39:09,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:09,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:39:09,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 12:39:09,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:09,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:39:09,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:39:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:39:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:39:09,756 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-09-07 12:39:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:10,001 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-09-07 12:39:10,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:39:10,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-09-07 12:39:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:10,003 INFO L225 Difference]: With dead ends: 147 [2019-09-07 12:39:10,003 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 12:39:10,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:39:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 12:39:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-09-07 12:39:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:39:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-09-07 12:39:10,016 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-09-07 12:39:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:10,016 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-09-07 12:39:10,016 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:39:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-09-07 12:39:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 12:39:10,017 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:10,018 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:10,018 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-09-07 12:39:10,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:10,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:10,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:10,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:10,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:10,026 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:10,026 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:10,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:10,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:16,980 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 12:39:16,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:16,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:39:16,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:39:17,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:17,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 12:39:17,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:39:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:39:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:39:17,090 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 8 states. [2019-09-07 12:39:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:17,208 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2019-09-07 12:39:17,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:39:17,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2019-09-07 12:39:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:17,210 INFO L225 Difference]: With dead ends: 156 [2019-09-07 12:39:17,210 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 12:39:17,211 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:39:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 12:39:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2019-09-07 12:39:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 12:39:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2019-09-07 12:39:17,222 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 60 [2019-09-07 12:39:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:17,222 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2019-09-07 12:39:17,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:39:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2019-09-07 12:39:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-07 12:39:17,223 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:17,223 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:17,224 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1510466474, now seen corresponding path program 6 times [2019-09-07 12:39:17,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:17,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:17,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:17,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,231 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:17,231 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:17,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:17,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:17,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-07 12:39:17,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:17,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:39:17,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-09-07 12:39:17,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:17,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:39:17,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:39:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:39:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:39:17,336 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 6 states. [2019-09-07 12:39:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:17,456 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2019-09-07 12:39:17,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:39:17,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2019-09-07 12:39:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:17,458 INFO L225 Difference]: With dead ends: 216 [2019-09-07 12:39:17,458 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:39:17,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:39:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:39:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2019-09-07 12:39:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 12:39:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2019-09-07 12:39:17,474 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 68 [2019-09-07 12:39:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:17,474 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2019-09-07 12:39:17,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:39:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2019-09-07 12:39:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-07 12:39:17,476 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:17,476 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:17,476 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash -155354480, now seen corresponding path program 7 times [2019-09-07 12:39:17,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:17,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:17,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:17,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:17,483 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:17,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:17,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:17,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:39:17,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-09-07 12:39:17,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:17,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:39:17,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:39:17,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:39:17,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:39:17,753 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand 9 states. [2019-09-07 12:39:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:17,902 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2019-09-07 12:39:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 12:39:17,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-09-07 12:39:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:17,903 INFO L225 Difference]: With dead ends: 218 [2019-09-07 12:39:17,903 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 12:39:17,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:39:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 12:39:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-09-07 12:39:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 12:39:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2019-09-07 12:39:17,915 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 86 [2019-09-07 12:39:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:17,916 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2019-09-07 12:39:17,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:39:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2019-09-07 12:39:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 12:39:17,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:17,917 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:17,918 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1646989565, now seen corresponding path program 8 times [2019-09-07 12:39:17,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:17,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:17,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:17,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:17,925 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:17,925 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:17,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:17,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:18,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:39:18,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:18,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:39:18,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-09-07 12:39:18,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:18,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 12:39:18,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:39:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:39:18,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:39:18,102 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 10 states. [2019-09-07 12:39:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:18,249 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2019-09-07 12:39:18,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 12:39:18,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2019-09-07 12:39:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:18,250 INFO L225 Difference]: With dead ends: 245 [2019-09-07 12:39:18,250 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 12:39:18,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:39:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 12:39:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-09-07 12:39:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 12:39:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2019-09-07 12:39:18,264 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 97 [2019-09-07 12:39:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:18,264 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2019-09-07 12:39:18,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:39:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2019-09-07 12:39:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 12:39:18,266 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:18,266 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:18,266 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1261139824, now seen corresponding path program 9 times [2019-09-07 12:39:18,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:18,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:18,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:18,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,274 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:18,274 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:18,274 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:18,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:18,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 12:39:18,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:18,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:39:18,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:18,400 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-09-07 12:39:18,401 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:39:18,406 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:39:18,406 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:39:18,407 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-09-07 12:39:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:39:18,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:39:18,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-07 12:39:18,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:39:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:39:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:39:18,443 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 6 states. [2019-09-07 12:39:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:18,519 INFO L93 Difference]: Finished difference Result 251 states and 323 transitions. [2019-09-07 12:39:18,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:39:18,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-09-07 12:39:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:18,521 INFO L225 Difference]: With dead ends: 251 [2019-09-07 12:39:18,521 INFO L226 Difference]: Without dead ends: 150 [2019-09-07 12:39:18,523 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:39:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-07 12:39:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2019-09-07 12:39:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 12:39:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2019-09-07 12:39:18,538 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 108 [2019-09-07 12:39:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:18,540 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2019-09-07 12:39:18,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:39:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2019-09-07 12:39:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 12:39:18,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:18,541 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:18,542 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2100173486, now seen corresponding path program 1 times [2019-09-07 12:39:18,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:18,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:18,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:18,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,555 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:18,555 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:18,555 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:18,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:39:18,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:39:18,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-09-07 12:39:18,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:18,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-07 12:39:18,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:39:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:39:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:39:18,771 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand 11 states. [2019-09-07 12:39:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:18,937 INFO L93 Difference]: Finished difference Result 272 states and 353 transitions. [2019-09-07 12:39:18,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:39:18,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2019-09-07 12:39:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:18,939 INFO L225 Difference]: With dead ends: 272 [2019-09-07 12:39:18,939 INFO L226 Difference]: Without dead ends: 155 [2019-09-07 12:39:18,940 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:39:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-07 12:39:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2019-09-07 12:39:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 12:39:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2019-09-07 12:39:18,951 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 108 [2019-09-07 12:39:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:18,952 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2019-09-07 12:39:18,952 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:39:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2019-09-07 12:39:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 12:39:18,953 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:18,953 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:18,953 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:18,954 INFO L82 PathProgramCache]: Analyzing trace with hash 225026463, now seen corresponding path program 2 times [2019-09-07 12:39:18,954 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:18,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:18,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:39:18,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:18,961 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:18,961 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:18,961 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:18,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:39:19,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:39:19,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:19,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:39:19,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:39:19,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:19,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-07 12:39:19,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:39:19,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:39:19,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:39:19,159 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 12 states. [2019-09-07 12:39:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:19,340 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2019-09-07 12:39:19,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:39:19,340 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2019-09-07 12:39:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:19,342 INFO L225 Difference]: With dead ends: 299 [2019-09-07 12:39:19,342 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 12:39:19,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:39:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 12:39:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2019-09-07 12:39:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-09-07 12:39:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2019-09-07 12:39:19,361 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 119 [2019-09-07 12:39:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:19,361 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2019-09-07 12:39:19,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:39:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2019-09-07 12:39:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 12:39:19,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:19,363 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:19,363 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1333730318, now seen corresponding path program 3 times [2019-09-07 12:39:19,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:19,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:19,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:19,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:19,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:19,372 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:19,372 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:19,372 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:19,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:39:20,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 12:39:20,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:20,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:39:20,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-09-07 12:39:20,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:20,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-07 12:39:20,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:39:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:39:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:39:20,479 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand 13 states. [2019-09-07 12:39:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:20,665 INFO L93 Difference]: Finished difference Result 326 states and 423 transitions. [2019-09-07 12:39:20,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:39:20,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-09-07 12:39:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:20,667 INFO L225 Difference]: With dead ends: 326 [2019-09-07 12:39:20,667 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:39:20,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:39:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:39:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2019-09-07 12:39:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-07 12:39:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2019-09-07 12:39:20,681 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 130 [2019-09-07 12:39:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:20,682 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2019-09-07 12:39:20,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:39:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2019-09-07 12:39:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-07 12:39:20,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:20,683 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:20,684 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash -135881921, now seen corresponding path program 4 times [2019-09-07 12:39:20,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:20,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:20,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:20,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:20,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:20,691 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:20,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:20,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-07 12:39:20,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:39:20,770 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:39:20,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:39:20,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:39:20,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:39:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1642 backedges. 117 proven. 1000 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-09-07 12:39:20,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:39:20,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-07 12:39:20,998 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 12:39:20,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 12:39:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-09-07 12:39:20,998 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand 17 states. [2019-09-07 12:39:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:39:21,619 INFO L93 Difference]: Finished difference Result 480 states and 616 transitions. [2019-09-07 12:39:21,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 12:39:21,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 141 [2019-09-07 12:39:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:39:21,624 INFO L225 Difference]: With dead ends: 480 [2019-09-07 12:39:21,625 INFO L226 Difference]: Without dead ends: 440 [2019-09-07 12:39:21,626 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:39:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-09-07 12:39:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 207. [2019-09-07 12:39:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-07 12:39:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2019-09-07 12:39:21,655 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 141 [2019-09-07 12:39:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:39:21,656 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2019-09-07 12:39:21,656 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 12:39:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2019-09-07 12:39:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-07 12:39:21,658 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:39:21,658 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 39, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:39:21,659 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:39:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:39:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1725028030, now seen corresponding path program 5 times [2019-09-07 12:39:21,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:39:21,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:39:21,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:21,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:39:21,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:39:21,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:39:21,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:39:21,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-07 12:39:21,687 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1