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/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:34:26,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:34:26,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:34:26,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:34:26,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:34:26,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:34:26,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:34:26,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:34:26,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:34:26,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:34:26,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:34:26,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:34:26,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:34:26,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:34:26,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:34:26,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:34:26,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:34:26,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:34:26,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:34:26,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:34:26,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:34:26,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:34:26,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:34:26,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:34:26,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:34:26,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:34:26,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:34:26,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:34:26,809 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 12:34:26,824 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:34:26,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:34:26,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:34:26,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:34:26,826 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:34:26,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:34:26,827 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:34:26,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:34:26,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:34:26,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:34:26,828 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:34:26,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:34:26,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:34:26,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:34:26,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:34:26,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:34:26,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:34:26,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:34:26,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:34:26,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:34:26,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:34:26,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:34:26,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:34:26,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:34:26,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:34:26,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:34:26,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:34:26,882 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:34:26,883 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:34:26,883 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-09-07 12:34:26,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab06487/84110fe1269041768a491bcc20a6b8cd/FLAG26da9b64f [2019-09-07 12:34:27,404 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:34:27,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-09-07 12:34:27,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab06487/84110fe1269041768a491bcc20a6b8cd/FLAG26da9b64f [2019-09-07 12:34:27,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aab06487/84110fe1269041768a491bcc20a6b8cd [2019-09-07 12:34:27,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:34:27,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:34:27,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:34:27,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:34:27,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:34:27,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:34:27" (1/1) ... [2019-09-07 12:34:27,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f766b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:27, skipping insertion in model container [2019-09-07 12:34:27,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:34:27" (1/1) ... [2019-09-07 12:34:27,806 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:34:27,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:34:28,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:34:28,019 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:34:28,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:34:28,156 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:34:28,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28 WrapperNode [2019-09-07 12:34:28,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:34:28,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:34:28,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:34:28,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:34:28,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (1/1) ... [2019-09-07 12:34:28,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:34:28,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:34:28,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:34:28,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:34:28,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (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 12:34:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:34:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:34:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 12:34:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:34:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:34:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-07 12:34:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:34:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:34:28,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:34:28,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:34:28,574 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:34:28,574 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-07 12:34:28,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:34:28 BoogieIcfgContainer [2019-09-07 12:34:28,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:34:28,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:34:28,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:34:28,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:34:28,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:34:27" (1/3) ... [2019-09-07 12:34:28,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2278fa17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:34:28, skipping insertion in model container [2019-09-07 12:34:28,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:34:28" (2/3) ... [2019-09-07 12:34:28,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2278fa17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:34:28, skipping insertion in model container [2019-09-07 12:34:28,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:34:28" (3/3) ... [2019-09-07 12:34:28,584 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2019-09-07 12:34:28,594 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:34:28,601 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:34:28,618 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:34:28,649 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:34:28,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:34:28,650 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:34:28,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:34:28,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:34:28,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:34:28,650 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:34:28,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:34:28,651 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:34:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-09-07 12:34:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-07 12:34:28,675 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:28,676 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:34:28,679 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-09-07 12:34:28,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:28,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:28,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:28,777 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:28,778 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:28,778 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 12:34:28,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:34:28,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:34:28,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:34:28,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:34:28,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:34:28,910 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:34:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:34:28,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:34:28,930 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-09-07 12:34:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:29,057 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-09-07 12:34:29,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:34:29,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-07 12:34:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:29,073 INFO L225 Difference]: With dead ends: 57 [2019-09-07 12:34:29,074 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 12:34:29,081 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 12:34:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 12:34:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-07 12:34:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 12:34:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-09-07 12:34:29,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-09-07 12:34:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:29,143 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-09-07 12:34:29,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:34:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-09-07 12:34:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 12:34:29,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:29,146 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 12:34:29,146 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-09-07 12:34:29,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:29,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:29,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:29,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,176 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:29,177 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:29,177 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 12:34:29,194 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 12:34:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:34:29,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:34:29,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:34:29,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:34:29,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:34:29,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:34:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:34:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:34:29,284 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-09-07 12:34:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:29,353 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-09-07 12:34:29,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:34:29,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-09-07 12:34:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:29,356 INFO L225 Difference]: With dead ends: 55 [2019-09-07 12:34:29,357 INFO L226 Difference]: Without dead ends: 36 [2019-09-07 12:34:29,358 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 12:34:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-07 12:34:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-09-07 12:34:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 12:34:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-07 12:34:29,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2019-09-07 12:34:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:29,370 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-07 12:34:29,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:34:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-07 12:34:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 12:34:29,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:29,371 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 12:34:29,372 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:29,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-09-07 12:34:29,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:29,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:29,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:29,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,380 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:29,381 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:29,381 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) [2019-09-07 12:34:29,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:34:29,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:34:29,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:29,479 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 12:34:29,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:29,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:34:29,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:34:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:34:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:34:29,487 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2019-09-07 12:34:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:29,609 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-09-07 12:34:29,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:34:29,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-07 12:34:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:29,612 INFO L225 Difference]: With dead ends: 66 [2019-09-07 12:34:29,612 INFO L226 Difference]: Without dead ends: 46 [2019-09-07 12:34:29,613 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 12:34:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-07 12:34:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2019-09-07 12:34:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 12:34:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-07 12:34:29,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-09-07 12:34:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:29,623 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-07 12:34:29,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:34:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-07 12:34:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 12:34:29,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:29,625 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 12:34:29,625 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-09-07 12:34:29,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:29,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:29,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,634 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:29,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:29,635 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:29,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:34:29,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-07 12:34:29,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:29,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:34:29,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:29,710 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 12:34:29,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:34:29,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-07 12:34:29,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:34:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:34:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:34:29,716 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-07 12:34:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:29,794 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-09-07 12:34:29,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:34:29,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-09-07 12:34:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:29,796 INFO L225 Difference]: With dead ends: 52 [2019-09-07 12:34:29,796 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 12:34:29,797 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 12:34:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 12:34:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2019-09-07 12:34:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 12:34:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-07 12:34:29,804 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2019-09-07 12:34:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:29,805 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-07 12:34:29,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:34:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-07 12:34:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-07 12:34:29,806 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:29,806 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, 1, 1, 1] [2019-09-07 12:34:29,807 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -362294696, now seen corresponding path program 1 times [2019-09-07 12:34:29,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:29,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:29,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:34:29,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:29,816 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:29,816 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:29,816 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:29,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:34:29,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:34:29,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 12:34:29,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:29,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:34:29,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:34:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:34:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:34:29,913 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-09-07 12:34:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:30,041 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2019-09-07 12:34:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:34:30,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-09-07 12:34:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:30,043 INFO L225 Difference]: With dead ends: 79 [2019-09-07 12:34:30,043 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 12:34:30,044 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 12:34:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 12:34:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2019-09-07 12:34:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 12:34:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-07 12:34:30,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-09-07 12:34:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:30,059 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-07 12:34:30,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:34:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-07 12:34:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 12:34:30,064 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:30,064 INFO L399 BasicCegarLoop]: trace histogram [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 12:34:30,064 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1895729479, now seen corresponding path program 2 times [2019-09-07 12:34:30,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:30,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:30,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:30,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,078 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:30,079 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:30,079 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) [2019-09-07 12:34:30,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:30,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:34:30,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:30,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:34:30,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 12:34:30,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:30,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:34:30,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:34:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:34:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:34:30,158 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-09-07 12:34:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:30,234 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-09-07 12:34:30,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:34:30,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-09-07 12:34:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:30,236 INFO L225 Difference]: With dead ends: 69 [2019-09-07 12:34:30,236 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 12:34:30,236 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 12:34:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 12:34:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2019-09-07 12:34:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 12:34:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-09-07 12:34:30,244 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2019-09-07 12:34:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:30,244 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-09-07 12:34:30,244 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:34:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-09-07 12:34:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-07 12:34:30,246 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:30,246 INFO L399 BasicCegarLoop]: trace histogram [3, 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 12:34:30,246 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1579223859, now seen corresponding path program 3 times [2019-09-07 12:34:30,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:30,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:30,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:34:30,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,253 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:30,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:30,254 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:30,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:34:30,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:34:30,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:30,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:34:30,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-07 12:34:30,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:30,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-09-07 12:34:30,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:34:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:34:30,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:34:30,328 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2019-09-07 12:34:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:30,395 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2019-09-07 12:34:30,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:34:30,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-09-07 12:34:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:30,398 INFO L225 Difference]: With dead ends: 64 [2019-09-07 12:34:30,399 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 12:34:30,402 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 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 12:34:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 12:34:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-09-07 12:34:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 12:34:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-09-07 12:34:30,411 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2019-09-07 12:34:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:30,411 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-09-07 12:34:30,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:34:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-09-07 12:34:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 12:34:30,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:30,413 INFO L399 BasicCegarLoop]: trace histogram [6, 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 12:34:30,413 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1507565378, now seen corresponding path program 4 times [2019-09-07 12:34:30,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:30,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:30,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:34:30,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,420 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:30,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:30,421 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:30,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:34:30,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:34:30,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:30,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:34:30,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 12:34:30,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:30,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:34:30,494 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:34:30,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:34:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:34:30,495 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2019-09-07 12:34:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:30,579 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2019-09-07 12:34:30,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:34:30,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-09-07 12:34:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:30,583 INFO L225 Difference]: With dead ends: 74 [2019-09-07 12:34:30,583 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 12:34:30,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:34:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 12:34:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-07 12:34:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 12:34:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-07 12:34:30,596 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 34 [2019-09-07 12:34:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:30,596 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-07 12:34:30,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:34:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-07 12:34:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-07 12:34:30,598 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:30,598 INFO L399 BasicCegarLoop]: trace histogram [6, 2, 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 12:34:30,599 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1070464288, now seen corresponding path program 1 times [2019-09-07 12:34:30,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:30,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:30,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:34:30,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,606 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:30,606 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:30,607 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:30,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:34:30,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:34:30,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:34:30,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:30,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-07 12:34:30,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:34:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:34:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:34:30,722 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2019-09-07 12:34:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:30,859 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2019-09-07 12:34:30,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 12:34:30,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-09-07 12:34:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:30,861 INFO L225 Difference]: With dead ends: 114 [2019-09-07 12:34:30,861 INFO L226 Difference]: Without dead ends: 83 [2019-09-07 12:34:30,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 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 12:34:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-07 12:34:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2019-09-07 12:34:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 12:34:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-09-07 12:34:30,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 36 [2019-09-07 12:34:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:30,872 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-09-07 12:34:30,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:34:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-09-07 12:34:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-07 12:34:30,873 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:30,873 INFO L399 BasicCegarLoop]: trace histogram [8, 2, 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 12:34:30,873 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash -620673214, now seen corresponding path program 2 times [2019-09-07 12:34:30,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:30,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:30,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:34:30,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:30,880 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:30,881 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:30,881 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:30,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:34:30,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:34:30,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:30,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:34:30,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 12:34:31,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:31,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-07 12:34:31,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:34:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:34:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:34:31,006 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 8 states. [2019-09-07 12:34:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:34:31,142 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2019-09-07 12:34:31,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:34:31,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-09-07 12:34:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:34:31,144 INFO L225 Difference]: With dead ends: 129 [2019-09-07 12:34:31,144 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 12:34:31,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 12:34:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 12:34:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 46. [2019-09-07 12:34:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 12:34:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-09-07 12:34:31,155 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 38 [2019-09-07 12:34:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:34:31,155 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-09-07 12:34:31,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:34:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-09-07 12:34:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 12:34:31,156 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:34:31,157 INFO L399 BasicCegarLoop]: trace histogram [10, 2, 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 12:34:31,157 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:34:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:34:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash 11267488, now seen corresponding path program 3 times [2019-09-07 12:34:31,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:34:31,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:34:31,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:31,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:34:31,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:34:31,164 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:34:31,164 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:34:31,164 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) [2019-09-07 12:34:31,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:34:31,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 12:34:31,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:34:31,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 12:34:31,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:34:31,276 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-09-07 12:34:31,276 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:34:31,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:34:31,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:34:31,296 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-09-07 12:34:31,375 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-09-07 12:34:31,375 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:34:31,393 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:34:31,393 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:34:31,394 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-09-07 12:34:31,448 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:34:31,448 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 106 [2019-09-07 12:34:31,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:34:31,502 INFO L567 ElimStorePlain]: treesize reduction 86, result has 44.9 percent of original size [2019-09-07 12:34:31,503 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-07 12:34:31,504 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:70 [2019-09-07 12:34:41,918 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-07 12:34:41,920 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2019-09-07 12:34:41,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:34:41,929 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:34:41,930 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:34:41,931 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:3 [2019-09-07 12:34:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-09-07 12:34:42,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:34:42,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-07 12:34:42,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 12:34:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 12:34:42,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=171, Unknown=5, NotChecked=0, Total=210 [2019-09-07 12:34:42,030 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 15 states. [2019-09-07 12:34:47,181 WARN L188 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2019-09-07 12:34:49,672 WARN L188 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-09-07 12:35:26,856 WARN L188 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-07 12:35:39,004 WARN L188 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2019-09-07 12:36:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:01,335 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-09-07 12:36:01,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 12:36:01,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2019-09-07 12:36:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:01,337 INFO L225 Difference]: With dead ends: 70 [2019-09-07 12:36:01,337 INFO L226 Difference]: Without dead ends: 68 [2019-09-07 12:36:01,338 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=161, Invalid=516, Unknown=25, NotChecked=0, Total=702 [2019-09-07 12:36:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-07 12:36:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2019-09-07 12:36:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-07 12:36:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-09-07 12:36:01,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 40 [2019-09-07 12:36:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:01,350 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-09-07 12:36:01,351 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 12:36:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-09-07 12:36:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 12:36:01,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:01,352 INFO L399 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:01,352 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash 424614712, now seen corresponding path program 1 times [2019-09-07 12:36:01,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:01,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:01,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:36:01,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:01,360 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:01,360 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:01,360 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:36:01,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:36:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:36:01,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:36:01,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:36:01,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:36:01,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-07 12:36:01,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:36:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:36:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:36:01,499 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 9 states. [2019-09-07 12:36:01,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:01,673 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2019-09-07 12:36:01,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 12:36:01,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-09-07 12:36:01,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:01,677 INFO L225 Difference]: With dead ends: 157 [2019-09-07 12:36:01,677 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 12:36:01,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:36:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 12:36:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2019-09-07 12:36:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 12:36:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-09-07 12:36:01,691 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 47 [2019-09-07 12:36:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:01,691 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-09-07 12:36:01,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:36:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-09-07 12:36:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 12:36:01,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:01,693 INFO L399 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:01,693 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1484627798, now seen corresponding path program 2 times [2019-09-07 12:36:01,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:01,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:01,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:01,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:36:01,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:01,699 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:01,700 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:01,700 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 12:36:01,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:36:01,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:36:01,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:36:01,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:36:01,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-09-07 12:36:01,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:36:01,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-07 12:36:01,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:36:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:36:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:36:01,830 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 10 states. [2019-09-07 12:36:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:02,070 INFO L93 Difference]: Finished difference Result 172 states and 218 transitions. [2019-09-07 12:36:02,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 12:36:02,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-09-07 12:36:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:02,072 INFO L225 Difference]: With dead ends: 172 [2019-09-07 12:36:02,072 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 12:36:02,073 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 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 12:36:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 12:36:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 57. [2019-09-07 12:36:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-07 12:36:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-09-07 12:36:02,093 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 49 [2019-09-07 12:36:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:02,093 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-09-07 12:36:02,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:36:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-09-07 12:36:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 12:36:02,095 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:02,095 INFO L399 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:02,095 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1682912584, now seen corresponding path program 3 times [2019-09-07 12:36:02,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:02,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:02,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:36:02,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,108 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:02,108 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:02,108 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 12:36:02,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:36:02,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 12:36:02,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:36:02,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:36:02,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-09-07 12:36:02,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:36:02,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:36:02,217 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:36:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:36:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:36:02,217 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 5 states. [2019-09-07 12:36:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:02,277 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2019-09-07 12:36:02,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:36:02,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-09-07 12:36:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:02,279 INFO L225 Difference]: With dead ends: 90 [2019-09-07 12:36:02,279 INFO L226 Difference]: Without dead ends: 64 [2019-09-07 12:36:02,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 12:36:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-07 12:36:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-09-07 12:36:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-07 12:36:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-09-07 12:36:02,295 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 51 [2019-09-07 12:36:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:02,296 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-09-07 12:36:02,296 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:36:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-09-07 12:36:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 12:36:02,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:02,298 INFO L399 BasicCegarLoop]: trace histogram [14, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:02,298 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1008468054, now seen corresponding path program 4 times [2019-09-07 12:36:02,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:02,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:02,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:36:02,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:02,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:02,314 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 12:36:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:36:02,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:36:02,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:36:02,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:36:02,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 12:36:02,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:36:02,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-07 12:36:02,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:36:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:36:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:36:02,404 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 5 states. [2019-09-07 12:36:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:02,455 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-09-07 12:36:02,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:36:02,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-09-07 12:36:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:02,457 INFO L225 Difference]: With dead ends: 116 [2019-09-07 12:36:02,457 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 12:36:02,458 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 12:36:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 12:36:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-09-07 12:36:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 12:36:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-09-07 12:36:02,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 53 [2019-09-07 12:36:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:02,480 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-09-07 12:36:02,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:36:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-09-07 12:36:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 12:36:02,482 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:02,482 INFO L399 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:02,482 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:02,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1438208743, now seen corresponding path program 5 times [2019-09-07 12:36:02,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:02,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:02,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:36:02,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:02,491 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:02,491 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:02,491 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 12:36:02,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:36:53,900 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 12:36:53,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:36:53,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:36:53,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 198 proven. 28 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-09-07 12:36:54,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:36:54,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-07 12:36:54,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:36:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:36:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:36:54,010 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 11 states. [2019-09-07 12:36:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:36:54,260 INFO L93 Difference]: Finished difference Result 206 states and 257 transitions. [2019-09-07 12:36:54,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:36:54,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2019-09-07 12:36:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:36:54,262 INFO L225 Difference]: With dead ends: 206 [2019-09-07 12:36:54,262 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 12:36:54,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 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 12:36:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 12:36:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 75. [2019-09-07 12:36:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:36:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-09-07 12:36:54,290 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 63 [2019-09-07 12:36:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:36:54,290 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-09-07 12:36:54,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:36:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-09-07 12:36:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 12:36:54,291 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:36:54,292 INFO L399 BasicCegarLoop]: trace histogram [24, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:36:54,292 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:36:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:36:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 382844036, now seen corresponding path program 6 times [2019-09-07 12:36:54,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:36:54,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:36:54,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:54,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:36:54,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:36:54,300 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:36:54,301 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:36:54,301 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 12:36:54,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:36:54,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 12:36:54,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:36:54,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 12:36:54,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:36:54,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-09-07 12:36:54,405 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,439 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:36:54,439 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,439 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-09-07 12:36:54,550 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-09-07 12:36:54,551 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,566 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:36:54,567 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,567 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2019-09-07 12:36:54,629 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:36:54,629 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 118 [2019-09-07 12:36:54,631 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,686 INFO L567 ElimStorePlain]: treesize reduction 96, result has 43.5 percent of original size [2019-09-07 12:36:54,687 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-07 12:36:54,688 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:74 [2019-09-07 12:36:54,801 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:36:54,802 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 289 [2019-09-07 12:36:54,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:36:54,907 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2019-09-07 12:36:54,908 INFO L567 ElimStorePlain]: treesize reduction 312, result has 26.1 percent of original size [2019-09-07 12:36:54,909 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-07 12:36:54,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:110 [2019-09-07 12:37:02,400 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_main_~i~0_26 Int) (v_main_~j~0_52 Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (let ((.cse2 (select |c_#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|)) (.cse0 (select |c_#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|))) (and (<= 499 v_main_~i~0_26) (not (= |v_main_~#A~0.base_BEFORE_CALL_1| |v_main_~#B~0.base_BEFORE_CALL_1|)) (<= 699 v_main_~j~0_52) (let ((.cse1 (+ (* 6000 v_main_~i~0_26) (* 4 v_main_~j~0_52)))) (= (select .cse0 .cse1) (select .cse2 .cse1))) (= (select .cse2 4) (select .cse0 4))))) is different from true [2019-09-07 12:37:02,671 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-07 12:37:02,672 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2019-09-07 12:37:02,673 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-07 12:37:02,679 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-07 12:37:02,680 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-07 12:37:02,680 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:3 [2019-09-07 12:37:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 362 trivial. 2 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:37:02,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:37:02,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-07 12:37:02,761 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 12:37:02,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 12:37:02,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=227, Unknown=3, NotChecked=30, Total=306 [2019-09-07 12:37:02,762 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 18 states. [2019-09-07 12:37:14,249 WARN L188 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-09-07 12:37:15,610 WARN L188 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 64 [2019-09-07 12:37:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:37:38,469 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2019-09-07 12:37:38,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 12:37:38,469 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2019-09-07 12:37:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:37:38,470 INFO L225 Difference]: With dead ends: 89 [2019-09-07 12:37:38,470 INFO L226 Difference]: Without dead ends: 87 [2019-09-07 12:37:38,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=117, Invalid=524, Unknown=13, NotChecked=48, Total=702 [2019-09-07 12:37:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-07 12:37:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2019-09-07 12:37:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-07 12:37:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2019-09-07 12:37:38,484 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 66 [2019-09-07 12:37:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:37:38,485 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2019-09-07 12:37:38,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 12:37:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2019-09-07 12:37:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 12:37:38,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:37:38,486 INFO L399 BasicCegarLoop]: trace histogram [24, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:37:38,486 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:37:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:37:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1982956500, now seen corresponding path program 7 times [2019-09-07 12:37:38,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:37:38,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:37:38,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:38,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:37:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:38,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:37:38,493 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:37:38,493 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 12:37:38,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:37:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:37:38,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:37:38,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:37:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:37:38,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:37:38,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-07 12:37:38,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:37:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:37:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:37:38,667 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 12 states. [2019-09-07 12:37:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:37:38,859 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2019-09-07 12:37:38,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:37:38,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-09-07 12:37:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:37:38,861 INFO L225 Difference]: With dead ends: 237 [2019-09-07 12:37:38,862 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 12:37:38,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 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 12:37:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 12:37:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 85. [2019-09-07 12:37:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 12:37:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-09-07 12:37:38,881 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 73 [2019-09-07 12:37:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:37:38,881 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-09-07 12:37:38,882 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:37:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-09-07 12:37:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 12:37:38,883 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:37:38,883 INFO L399 BasicCegarLoop]: trace histogram [27, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:37:38,883 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:37:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:37:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1628609841, now seen corresponding path program 8 times [2019-09-07 12:37:38,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:37:38,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:37:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:38,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:37:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:38,890 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:37:38,890 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:37:38,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:37:38,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:37:38,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:37:38,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:37:38,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:37:38,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:37:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-09-07 12:37:39,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:37:39,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-07 12:37:39,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:37:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:37:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:37:39,101 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 13 states. [2019-09-07 12:37:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:37:39,323 INFO L93 Difference]: Finished difference Result 254 states and 315 transitions. [2019-09-07 12:37:39,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:37:39,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-09-07 12:37:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:37:39,326 INFO L225 Difference]: With dead ends: 254 [2019-09-07 12:37:39,326 INFO L226 Difference]: Without dead ends: 186 [2019-09-07 12:37:39,327 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 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 12:37:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-09-07 12:37:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 88. [2019-09-07 12:37:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 12:37:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2019-09-07 12:37:39,343 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 76 [2019-09-07 12:37:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:37:39,343 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2019-09-07 12:37:39,343 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:37:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2019-09-07 12:37:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-07 12:37:39,344 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:37:39,344 INFO L399 BasicCegarLoop]: trace histogram [30, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:37:39,345 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:37:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:37:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1132160076, now seen corresponding path program 9 times [2019-09-07 12:37:39,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:37:39,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:37:39,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:37:39,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,351 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:37:39,351 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:37:39,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:37:39,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:37:39,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 12:37:39,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:37:39,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:37:39,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:37:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2019-09-07 12:37:39,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:37:39,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:37:39,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:37:39,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:37:39,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:37:39,464 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 6 states. [2019-09-07 12:37:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:37:39,529 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-09-07 12:37:39,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:37:39,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2019-09-07 12:37:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:37:39,530 INFO L225 Difference]: With dead ends: 132 [2019-09-07 12:37:39,531 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 12:37:39,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 12:37:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 12:37:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 12:37:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 12:37:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2019-09-07 12:37:39,548 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 79 [2019-09-07 12:37:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:37:39,548 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2019-09-07 12:37:39,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:37:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2019-09-07 12:37:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 12:37:39,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:37:39,550 INFO L399 BasicCegarLoop]: trace histogram [30, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:37:39,550 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:37:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:37:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 724222226, now seen corresponding path program 10 times [2019-09-07 12:37:39,550 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:37:39,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:37:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:37:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:37:39,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:37:39,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-07 12:37:39,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:37:39,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:37:39,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:37:39,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:37:39,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:37:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:37:39,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:37:39,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-07 12:37:39,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:37:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:37:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:37:39,689 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 6 states. [2019-09-07 12:37:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:37:39,751 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2019-09-07 12:37:39,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:37:39,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2019-09-07 12:37:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:37:39,752 INFO L225 Difference]: With dead ends: 165 [2019-09-07 12:37:39,752 INFO L226 Difference]: Without dead ends: 118 [2019-09-07 12:37:39,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 12:37:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-07 12:37:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2019-09-07 12:37:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 12:37:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-09-07 12:37:39,784 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 81 [2019-09-07 12:37:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:37:39,785 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-09-07 12:37:39,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:37:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-09-07 12:37:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-07 12:37:39,786 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:37:39,786 INFO L399 BasicCegarLoop]: trace histogram [40, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:37:39,786 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:37:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:37:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1320843330, now seen corresponding path program 11 times [2019-09-07 12:37:39,787 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:37:39,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:37:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:37:39,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:37:39,793 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-07 12:37:39,793 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-07 12:37:39,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-07 12:37:39,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true