/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-industry-pattern/array_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:38:34,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:38:34,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:38:34,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:38:34,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:38:34,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:38:34,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:38:34,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:38:34,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:38:34,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:38:34,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:38:34,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:38:34,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:38:34,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:38:34,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:38:34,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:38:34,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:38:34,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:38:34,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:38:34,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:38:34,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:38:34,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:38:34,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:38:34,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:38:34,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:38:34,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:38:34,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:38:34,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:38:34,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:38:34,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:38:34,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:38:34,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:38:34,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:38:34,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:38:34,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:38:34,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:38:34,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:38:34,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:38:34,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:38:34,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:38:34,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:38:34,959 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 20:38:34,974 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:38:34,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:38:34,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:38:34,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:38:34,976 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:38:34,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:38:34,976 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:38:34,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:38:34,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:38:34,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:38:34,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:38:34,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:38:34,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:38:34,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:38:34,978 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:38:34,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:38:34,978 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:38:34,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:38:34,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:38:34,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:38:34,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:38:34,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:38:34,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:38:34,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:38:34,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:38:34,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:38:34,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:38:34,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:38:34,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:38:34,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:38:35,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:38:35,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:38:35,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:38:35,270 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:38:35,270 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:38:35,271 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-11-23 20:38:35,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34aea3d8/1629589b797b4e9197b22fe2c75a0929/FLAG86c61a992 [2019-11-23 20:38:35,815 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:38:35,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-11-23 20:38:35,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34aea3d8/1629589b797b4e9197b22fe2c75a0929/FLAG86c61a992 [2019-11-23 20:38:36,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e34aea3d8/1629589b797b4e9197b22fe2c75a0929 [2019-11-23 20:38:36,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:38:36,175 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:38:36,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:36,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:38:36,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:38:36,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2db126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36, skipping insertion in model container [2019-11-23 20:38:36,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:38:36,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:38:36,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:36,395 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:38:36,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:36,439 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:38:36,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36 WrapperNode [2019-11-23 20:38:36,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:36,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:36,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:38:36,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:38:36,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:36,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:38:36,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:38:36,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:38:36,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (1/1) ... [2019-11-23 20:38:36,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:38:36,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:38:36,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:38:36,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:38:36,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (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 20:38:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:38:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:38:36,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:38:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:38:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:38:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:38:36,922 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:38:36,922 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:38:36,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:36 BoogieIcfgContainer [2019-11-23 20:38:36,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:38:36,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:38:36,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:38:36,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:38:36,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:36" (1/3) ... [2019-11-23 20:38:36,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c535fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:36, skipping insertion in model container [2019-11-23 20:38:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:36" (2/3) ... [2019-11-23 20:38:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c535fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:36, skipping insertion in model container [2019-11-23 20:38:36,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:36" (3/3) ... [2019-11-23 20:38:36,953 INFO L109 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2019-11-23 20:38:36,977 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:38:36,985 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:38:36,998 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:38:37,035 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:38:37,035 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:38:37,036 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:38:37,036 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:38:37,036 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:38:37,036 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:38:37,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:38:37,036 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:38:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:38:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:38:37,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:37,063 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:37,064 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash 542545282, now seen corresponding path program 1 times [2019-11-23 20:38:37,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:37,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108377774] [2019-11-23 20:38:37,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:37,197 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 20:38:37,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108377774] [2019-11-23 20:38:37,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:37,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:38:37,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970831927] [2019-11-23 20:38:37,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:38:37,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:38:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:38:37,222 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-23 20:38:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:37,242 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-11-23 20:38:37,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:38:37,244 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:38:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:37,254 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:38:37,254 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:38:37,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:38:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:38:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:38:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:38:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-23 20:38:37,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2019-11-23 20:38:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:37,297 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-23 20:38:37,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:38:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-23 20:38:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:38:37,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:37,298 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:37,299 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash -630060617, now seen corresponding path program 1 times [2019-11-23 20:38:37,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:37,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930645612] [2019-11-23 20:38:37,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:37,358 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 20:38:37,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930645612] [2019-11-23 20:38:37,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:37,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:38:37,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302403235] [2019-11-23 20:38:37,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:38:37,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:38:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:38:37,363 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2019-11-23 20:38:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:37,444 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-11-23 20:38:37,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:38:37,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:38:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:37,446 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:38:37,447 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:38:37,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 20:38:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:38:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2019-11-23 20:38:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:38:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-23 20:38:37,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2019-11-23 20:38:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:37,458 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-23 20:38:37,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:38:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-23 20:38:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:38:37,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:37,460 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:37,461 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2036151027, now seen corresponding path program 1 times [2019-11-23 20:38:37,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:37,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439981532] [2019-11-23 20:38:37,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:37,506 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:38:37,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52961006] [2019-11-23 20:38:37,507 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 20:38:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:37,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:38:37,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:38:37,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439981532] [2019-11-23 20:38:37,662 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:38:37,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52961006] [2019-11-23 20:38:37,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:38:37,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:38:37,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002411585] [2019-11-23 20:38:37,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:38:37,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:38:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:38:37,666 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-23 20:38:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:37,758 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2019-11-23 20:38:37,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:38:37,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:38:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:37,760 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:38:37,760 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:38:37,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 20:38:37,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:38:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2019-11-23 20:38:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:38:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:38:37,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2019-11-23 20:38:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:37,767 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:38:37,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:38:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:38:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:38:37,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:37,769 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:37,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:37,977 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1468366451, now seen corresponding path program 2 times [2019-11-23 20:38:37,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:37,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965506933] [2019-11-23 20:38:37,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:38,022 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:38:38,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788390750] [2019-11-23 20:38:38,023 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:38,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:38,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:38,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:38:38,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:38:38,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965506933] [2019-11-23 20:38:38,121 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:38:38,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788390750] [2019-11-23 20:38:38,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:38:38,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:38:38,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674425355] [2019-11-23 20:38:38,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:38:38,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:38:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:38:38,125 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2019-11-23 20:38:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:38,276 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2019-11-23 20:38:38,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:38:38,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-23 20:38:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:38,278 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:38:38,278 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:38:38,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:38:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:38:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2019-11-23 20:38:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:38:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-11-23 20:38:38,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2019-11-23 20:38:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:38,286 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-11-23 20:38:38,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:38:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-11-23 20:38:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:38:38,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:38,287 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:38,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:38,492 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1638808119, now seen corresponding path program 3 times [2019-11-23 20:38:38,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:38,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804996972] [2019-11-23 20:38:38,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:38,530 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:38:38,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315155430] [2019-11-23 20:38:38,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:39,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:38:39,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:39,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:38:39,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:38:39,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804996972] [2019-11-23 20:38:39,410 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:38:39,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315155430] [2019-11-23 20:38:39,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:38:39,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:38:39,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388152763] [2019-11-23 20:38:39,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:38:39,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:38:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:38:39,413 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2019-11-23 20:38:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:39,541 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2019-11-23 20:38:39,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:38:39,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-23 20:38:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:39,543 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:38:39,543 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:38:39,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 20:38:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:38:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2019-11-23 20:38:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:38:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-23 20:38:39,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2019-11-23 20:38:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:39,551 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-23 20:38:39,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:38:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-23 20:38:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:38:39,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:39,553 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:39,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:39,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1366955217, now seen corresponding path program 4 times [2019-11-23 20:38:39,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:39,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537667500] [2019-11-23 20:38:39,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:39,781 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:38:39,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368340221] [2019-11-23 20:38:39,782 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:39,826 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:39,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:39,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:38:39,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:38:39,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537667500] [2019-11-23 20:38:39,879 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:38:39,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368340221] [2019-11-23 20:38:39,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:38:39,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:38:39,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628442745] [2019-11-23 20:38:39,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:38:39,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:38:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:38:39,883 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2019-11-23 20:38:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:40,001 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2019-11-23 20:38:40,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:38:40,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-23 20:38:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:40,003 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:38:40,003 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:38:40,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 20:38:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:38:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 39. [2019-11-23 20:38:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:38:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-23 20:38:40,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2019-11-23 20:38:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:40,010 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-23 20:38:40,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:38:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-23 20:38:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:38:40,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:40,012 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:40,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:40,223 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:40,224 INFO L82 PathProgramCache]: Analyzing trace with hash 684091771, now seen corresponding path program 5 times [2019-11-23 20:38:40,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:40,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486505025] [2019-11-23 20:38:40,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:40,239 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:38:40,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290805965] [2019-11-23 20:38:40,240 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true