/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:39:22,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:39:22,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:39:22,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:39:22,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:39:22,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:39:22,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:39:22,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:39:22,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:39:22,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:39:22,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:39:22,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:39:22,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:39:22,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:39:22,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:39:22,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:39:22,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:39:22,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:39:22,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:39:22,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:39:22,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:39:22,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:39:22,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:39:22,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:39:22,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:39:22,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:39:22,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:39:22,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:39:22,553 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 [2019-11-23 20:39:22,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:39:22,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:39:22,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:39:22,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:39:22,568 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:39:22,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:39:22,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:39:22,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:39:22,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:39:22,570 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:39:22,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:39:22,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:39:22,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:39:22,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:39:22,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:39:22,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:39:22,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:39:22,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:39:22,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:39:22,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:39:22,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:39:22,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:39:22,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:39:22,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:39:22,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:39:22,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:39:22,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:39:22,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:39:22,864 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:39:22,864 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:39:22,865 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-11-23 20:39:22,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518e319f/56398f16045b4954ac9e1a418f5ec719/FLAGbd165ff55 [2019-11-23 20:39:23,391 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:39:23,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-11-23 20:39:23,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518e319f/56398f16045b4954ac9e1a418f5ec719/FLAGbd165ff55 [2019-11-23 20:39:23,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518e319f/56398f16045b4954ac9e1a418f5ec719 [2019-11-23 20:39:23,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:39:23,752 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:39:23,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:23,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:39:23,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:39:23,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:23" (1/1) ... [2019-11-23 20:39:23,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e10d391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:23, skipping insertion in model container [2019-11-23 20:39:23,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:23" (1/1) ... [2019-11-23 20:39:23,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:39:23,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:39:23,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:23,975 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:39:23,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:24,016 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:39:24,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24 WrapperNode [2019-11-23 20:39:24,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:24,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:24,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:39:24,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:39:24,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:24,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:39:24,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:39:24,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:39:24,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... [2019-11-23 20:39:24,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:39:24,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:39:24,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:39:24,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:39:24,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:39:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:39:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:39:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:39:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:39:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:39:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:39:24,513 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:39:24,514 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:39:24,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:24 BoogieIcfgContainer [2019-11-23 20:39:24,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:39:24,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:39:24,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:39:24,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:39:24,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:23" (1/3) ... [2019-11-23 20:39:24,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:24, skipping insertion in model container [2019-11-23 20:39:24,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:24" (2/3) ... [2019-11-23 20:39:24,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d02c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:24, skipping insertion in model container [2019-11-23 20:39:24,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:24" (3/3) ... [2019-11-23 20:39:24,535 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2019-11-23 20:39:24,546 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:39:24,553 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:39:24,575 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:39:24,601 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:39:24,601 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:39:24,601 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:39:24,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:39:24,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:39:24,602 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:39:24,602 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:39:24,602 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:39:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:39:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:39:24,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:24,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:24,621 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2019-11-23 20:39:24,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:24,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144631496] [2019-11-23 20:39:24,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:24,708 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:24,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021268188] [2019-11-23 20:39:24,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:24,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:24,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:24,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144631496] [2019-11-23 20:39:24,825 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:24,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021268188] [2019-11-23 20:39:24,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:24,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:24,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795859998] [2019-11-23 20:39:24,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:39:24,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:39:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:24,851 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-23 20:39:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:24,964 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2019-11-23 20:39:24,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:39:24,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:39:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:24,980 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:39:24,981 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:39:24,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:25,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:39:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-23 20:39:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:39:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:39:25,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2019-11-23 20:39:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:25,042 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:39:25,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:39:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:39:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:39:25,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:25,044 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:25,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,248 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2019-11-23 20:39:25,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:25,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892704886] [2019-11-23 20:39:25,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:25,256 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:25,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440695668] [2019-11-23 20:39:25,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:25,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:25,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:25,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892704886] [2019-11-23 20:39:25,325 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:25,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440695668] [2019-11-23 20:39:25,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:25,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:25,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176777287] [2019-11-23 20:39:25,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:25,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:25,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:25,329 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2019-11-23 20:39:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:25,414 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2019-11-23 20:39:25,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:25,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:39:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:25,416 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:39:25,416 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:39:25,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:39:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-11-23 20:39:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:39:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-23 20:39:25,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2019-11-23 20:39:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:25,431 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-23 20:39:25,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-23 20:39:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:39:25,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:25,434 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:25,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,638 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2019-11-23 20:39:25,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:25,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094897983] [2019-11-23 20:39:25,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:25,646 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:25,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562303156] [2019-11-23 20:39:25,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:25,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:25,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:25,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094897983] [2019-11-23 20:39:25,738 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:25,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562303156] [2019-11-23 20:39:25,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:25,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:25,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119454408] [2019-11-23 20:39:25,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:25,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:25,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:25,741 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2019-11-23 20:39:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:25,818 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:39:25,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:25,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:39:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:25,820 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:39:25,820 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:39:25,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:39:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-23 20:39:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:39:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:39:25,828 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-23 20:39:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:25,828 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:39:25,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:39:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:39:25,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:25,832 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:26,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,043 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2019-11-23 20:39:26,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:26,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820137950] [2019-11-23 20:39:26,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:26,051 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:26,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393450194] [2019-11-23 20:39:26,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 20:39:26,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:39:26,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:26,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:26,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:39:26,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820137950] [2019-11-23 20:39:26,131 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:26,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393450194] [2019-11-23 20:39:26,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:26,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:26,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190955557] [2019-11-23 20:39:26,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:26,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:26,134 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2019-11-23 20:39:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:26,193 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2019-11-23 20:39:26,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:26,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:39:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:26,195 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:39:26,195 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:39:26,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:39:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2019-11-23 20:39:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:39:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 20:39:26,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2019-11-23 20:39:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:26,204 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 20:39:26,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 20:39:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:39:26,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:26,205 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:26,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,409 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2019-11-23 20:39:26,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:26,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538112195] [2019-11-23 20:39:26,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:26,417 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:26,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892568881] [2019-11-23 20:39:26,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:39:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:26,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:39:26,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:39:26,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538112195] [2019-11-23 20:39:26,499 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:26,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892568881] [2019-11-23 20:39:26,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:26,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:39:26,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342364998] [2019-11-23 20:39:26,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:39:26,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:39:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:26,502 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2019-11-23 20:39:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:26,584 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2019-11-23 20:39:26,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:39:26,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-23 20:39:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:26,585 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:39:26,585 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:39:26,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:39:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-23 20:39:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:39:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-23 20:39:26,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-11-23 20:39:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:26,594 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-23 20:39:26,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:39:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-23 20:39:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:39:26,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:26,595 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:26,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,807 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2019-11-23 20:39:26,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:26,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241316144] [2019-11-23 20:39:26,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:26,815 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:26,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808939742] [2019-11-23 20:39:26,815 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:26,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:26,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:26,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:39:26,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:39:26,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241316144] [2019-11-23 20:39:26,910 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:26,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808939742] [2019-11-23 20:39:26,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:26,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:39:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4811687] [2019-11-23 20:39:26,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:39:26,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:39:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:26,913 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-11-23 20:39:27,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:27,034 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2019-11-23 20:39:27,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:39:27,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-23 20:39:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:27,036 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:39:27,036 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:39:27,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:39:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2019-11-23 20:39:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:39:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:39:27,045 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2019-11-23 20:39:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:27,045 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:39:27,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:39:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:39:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:39:27,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:27,046 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:27,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:27,247 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2019-11-23 20:39:27,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:27,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153244422] [2019-11-23 20:39:27,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:27,257 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:27,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048943373] [2019-11-23 20:39:27,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 20:39:27,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:39:27,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:27,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:27,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:39:27,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153244422] [2019-11-23 20:39:27,336 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:27,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048943373] [2019-11-23 20:39:27,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:27,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:27,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081473020] [2019-11-23 20:39:27,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:27,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:27,338 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2019-11-23 20:39:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:27,435 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2019-11-23 20:39:27,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:27,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-23 20:39:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:27,439 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:39:27,439 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:39:27,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:39:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2019-11-23 20:39:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:39:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-23 20:39:27,467 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2019-11-23 20:39:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:27,468 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-23 20:39:27,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-23 20:39:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:39:27,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:27,470 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:27,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:27,673 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:27,674 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2019-11-23 20:39:27,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:27,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335966055] [2019-11-23 20:39:27,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:27,680 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:27,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293173451] [2019-11-23 20:39:27,680 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 20:39:27,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:27,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:27,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:39:27,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:39:27,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335966055] [2019-11-23 20:39:27,826 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:27,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293173451] [2019-11-23 20:39:27,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:27,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:39:27,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454193140] [2019-11-23 20:39:27,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:39:27,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:39:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:39:27,828 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 10 states. [2019-11-23 20:39:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:28,068 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2019-11-23 20:39:28,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:39:28,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-23 20:39:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:28,071 INFO L225 Difference]: With dead ends: 168 [2019-11-23 20:39:28,071 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:39:28,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:39:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:39:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2019-11-23 20:39:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:39:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2019-11-23 20:39:28,102 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 38 [2019-11-23 20:39:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:28,103 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2019-11-23 20:39:28,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:39:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2019-11-23 20:39:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:39:28,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:28,109 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:28,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:28,318 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1931323112, now seen corresponding path program 5 times [2019-11-23 20:39:28,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:28,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728713059] [2019-11-23 20:39:28,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:28,325 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:28,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143949261] [2019-11-23 20:39:28,325 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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