/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/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:17,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:17,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:17,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:17,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:17,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:17,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:17,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:17,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:17,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:17,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:17,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:17,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:17,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:17,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:17,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:17,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:17,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:17,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:17,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:17,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:17,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:17,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:17,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:17,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:17,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:17,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:17,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:17,644 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 20:42:17,658 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:17,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:17,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:17,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:17,660 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:17,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:17,661 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:17,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:17,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:17,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:17,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:17,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:17,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:17,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:17,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:17,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:17,663 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:17,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:17,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:17,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:17,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:17,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:17,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:17,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:17,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:17,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:17,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:17,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:17,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:17,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:18,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:18,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:18,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:18,029 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:18,029 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:18,030 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-23 20:42:18,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e60eab3d/ef42821878b64ce9999dc73c5121eebc/FLAGafc10e166 [2019-11-23 20:42:18,502 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:18,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-23 20:42:18,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e60eab3d/ef42821878b64ce9999dc73c5121eebc/FLAGafc10e166 [2019-11-23 20:42:18,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e60eab3d/ef42821878b64ce9999dc73c5121eebc [2019-11-23 20:42:18,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:18,931 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:18,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:18,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:18,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:18,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1348e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18, skipping insertion in model container [2019-11-23 20:42:18,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:18,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:19,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:19,190 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:19,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:19,249 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:19,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19 WrapperNode [2019-11-23 20:42:19,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:19,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:19,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:19,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:19,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:19,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:19,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:19,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:19,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (1/1) ... [2019-11-23 20:42:19,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:19,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:19,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:19,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:19,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (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 20:42:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:19,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:19,742 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:19,742 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:42:19,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:19 BoogieIcfgContainer [2019-11-23 20:42:19,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:19,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:19,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:19,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:19,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:18" (1/3) ... [2019-11-23 20:42:19,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daf4391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:19, skipping insertion in model container [2019-11-23 20:42:19,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:19" (2/3) ... [2019-11-23 20:42:19,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daf4391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:19, skipping insertion in model container [2019-11-23 20:42:19,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:19" (3/3) ... [2019-11-23 20:42:19,764 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-11-23 20:42:19,773 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:19,779 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:19,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:19,809 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:19,810 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:19,810 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:19,810 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:19,810 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:19,810 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:19,810 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:19,811 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:42:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:42:19,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:19,828 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:19,829 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2019-11-23 20:42:19,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:19,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891148355] [2019-11-23 20:42:19,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:19,911 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:19,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975270058] [2019-11-23 20:42:19,912 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 20:42:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:19,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:42:19,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:19,985 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 20:42:19,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891148355] [2019-11-23 20:42:19,986 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:19,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975270058] [2019-11-23 20:42:19,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:19,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:42:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143902823] [2019-11-23 20:42:19,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:42:19,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:42:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:42:20,008 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-23 20:42:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:20,024 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2019-11-23 20:42:20,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:42:20,025 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:42:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:20,032 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:42:20,032 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:42:20,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 20:42:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:42:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:42:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:42:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-11-23 20:42:20,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2019-11-23 20:42:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:20,067 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-11-23 20:42:20,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:42:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2019-11-23 20:42:20,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:42:20,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:20,068 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:20,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:20,269 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:20,270 INFO L82 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2019-11-23 20:42:20,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:20,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106403571] [2019-11-23 20:42:20,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:20,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:20,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812530390] [2019-11-23 20:42:20,279 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 20:42:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:20,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:20,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:20,361 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 20:42:20,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106403571] [2019-11-23 20:42:20,362 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:20,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812530390] [2019-11-23 20:42:20,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:20,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:42:20,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830323306] [2019-11-23 20:42:20,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:42:20,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:42:20,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:20,366 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 3 states. [2019-11-23 20:42:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:20,443 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2019-11-23 20:42:20,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:42:20,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:42:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:20,446 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:42:20,446 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:42:20,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 20:42:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:42:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-11-23 20:42:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:42:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:42:20,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2019-11-23 20:42:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:20,459 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:42:20,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:42:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:42:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:42:20,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:20,461 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:20,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:20,666 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2019-11-23 20:42:20,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:20,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729806502] [2019-11-23 20:42:20,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:20,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:20,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256795065] [2019-11-23 20:42:20,674 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 20:42:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:20,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:20,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:20,748 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 20:42:20,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729806502] [2019-11-23 20:42:20,749 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:20,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256795065] [2019-11-23 20:42:20,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:20,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:20,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145848047] [2019-11-23 20:42:20,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:20,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:20,751 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2019-11-23 20:42:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:20,833 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-23 20:42:20,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:20,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:42:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:20,835 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:42:20,835 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:42:20,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 20:42:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:42:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2019-11-23 20:42:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:42:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:42:20,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2019-11-23 20:42:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:20,843 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:42:20,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:42:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:42:20,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:20,844 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:21,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:21,048 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2019-11-23 20:42:21,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:21,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727016731] [2019-11-23 20:42:21,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:21,055 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:21,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615088708] [2019-11-23 20:42:21,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:42:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:21,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:21,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:21,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727016731] [2019-11-23 20:42:21,120 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:21,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615088708] [2019-11-23 20:42:21,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:21,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:21,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534159574] [2019-11-23 20:42:21,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:21,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:21,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:21,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:21,122 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-23 20:42:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:21,191 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2019-11-23 20:42:21,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:21,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:42:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:21,202 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:42:21,202 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:42:21,203 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 20:42:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:42:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 20:42:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:42:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:42:21,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2019-11-23 20:42:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:21,214 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:42:21,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:42:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:42:21,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:21,215 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:21,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:21,419 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2019-11-23 20:42:21,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:21,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068569499] [2019-11-23 20:42:21,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:21,425 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:21,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920116240] [2019-11-23 20:42:21,426 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 20:42:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:21,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:21,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:21,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068569499] [2019-11-23 20:42:21,489 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:21,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920116240] [2019-11-23 20:42:21,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:21,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:21,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086756811] [2019-11-23 20:42:21,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:21,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:21,491 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2019-11-23 20:42:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:21,568 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2019-11-23 20:42:21,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:21,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:42:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:21,570 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:42:21,570 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:42:21,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:42:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:42:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-11-23 20:42:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:42:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:42:21,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-11-23 20:42:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:21,585 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:42:21,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:42:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:42:21,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:21,586 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:21,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:21,787 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2019-11-23 20:42:21,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:21,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331673826] [2019-11-23 20:42:21,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:21,792 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:21,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679177675] [2019-11-23 20:42:21,792 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 20:42:21,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:21,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:21,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:42:21,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:21,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331673826] [2019-11-23 20:42:21,868 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:21,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679177675] [2019-11-23 20:42:21,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:21,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:42:21,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760635632] [2019-11-23 20:42:21,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:21,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:21,871 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-23 20:42:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:21,951 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2019-11-23 20:42:21,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:21,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:42:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:21,952 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:42:21,952 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:42:21,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 20:42:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:42:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-11-23 20:42:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:42:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 20:42:21,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2019-11-23 20:42:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:21,960 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 20:42:21,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 20:42:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:42:21,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:21,961 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:22,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:22,165 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2019-11-23 20:42:22,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:22,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142357248] [2019-11-23 20:42:22,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:22,173 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:22,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258989531] [2019-11-23 20:42:22,173 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 20:42:22,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:22,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:22,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:22,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:42:22,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142357248] [2019-11-23 20:42:22,227 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:22,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258989531] [2019-11-23 20:42:22,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:22,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:42:22,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331822719] [2019-11-23 20:42:22,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:22,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:22,229 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-11-23 20:42:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:22,279 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2019-11-23 20:42:22,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:22,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-23 20:42:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:22,281 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:42:22,281 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:42:22,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 20:42:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:42:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-11-23 20:42:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:42:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-23 20:42:22,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2019-11-23 20:42:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:22,289 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-23 20:42:22,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-23 20:42:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:42:22,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:22,290 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:22,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:22,494 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2019-11-23 20:42:22,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:22,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982928684] [2019-11-23 20:42:22,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:22,500 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:22,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760423898] [2019-11-23 20:42:22,500 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 20:42:22,546 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:22,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:22,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:42:22,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:42:22,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982928684] [2019-11-23 20:42:22,616 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:22,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760423898] [2019-11-23 20:42:22,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:22,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:42:22,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003932221] [2019-11-23 20:42:22,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:42:22,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:42:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:22,624 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2019-11-23 20:42:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:22,800 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2019-11-23 20:42:22,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:42:22,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-23 20:42:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:22,802 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:42:22,803 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:42:22,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:42:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:42:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2019-11-23 20:42:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:42:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2019-11-23 20:42:22,818 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2019-11-23 20:42:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:22,818 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2019-11-23 20:42:22,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:42:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2019-11-23 20:42:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:42:22,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:22,821 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:23,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:23,025 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2019-11-23 20:42:23,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:23,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:42:23,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:23,034 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:23,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960078920] [2019-11-23 20:42:23,035 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 [2019-11-23 20:42:23,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:42:23,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:23,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:42:23,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 74 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:42:23,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:42:23,827 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:23,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960078920] [2019-11-23 20:42:23,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:23,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:23,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060087569] [2019-11-23 20:42:23,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:23,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:23,829 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2019-11-23 20:42:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:23,969 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2019-11-23 20:42:23,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:42:23,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-23 20:42:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:23,971 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:42:23,971 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:42:23,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:42:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2019-11-23 20:42:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:42:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2019-11-23 20:42:23,987 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 39 [2019-11-23 20:42:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:23,988 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2019-11-23 20:42:23,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2019-11-23 20:42:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:42:23,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:23,989 INFO L410 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:24,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,192 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1608116951, now seen corresponding path program 6 times [2019-11-23 20:42:24,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:24,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995585238] [2019-11-23 20:42:24,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:24,198 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:24,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828511150] [2019-11-23 20:42:24,199 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:42:24,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:24,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:42:24,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995585238] [2019-11-23 20:42:24,439 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:24,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828511150] [2019-11-23 20:42:24,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:24,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:24,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452259076] [2019-11-23 20:42:24,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:24,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:24,441 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 7 states. [2019-11-23 20:42:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:24,516 INFO L93 Difference]: Finished difference Result 219 states and 277 transitions. [2019-11-23 20:42:24,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:24,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-11-23 20:42:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,519 INFO L225 Difference]: With dead ends: 219 [2019-11-23 20:42:24,519 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:42:24,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 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 20:42:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:42:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2019-11-23 20:42:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 20:42:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2019-11-23 20:42:24,552 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 45 [2019-11-23 20:42:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,552 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2019-11-23 20:42:24,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2019-11-23 20:42:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:42:24,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,554 INFO L410 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:24,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,758 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:24,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1934901436, now seen corresponding path program 7 times [2019-11-23 20:42:24,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:24,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 20:42:24,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:24,765 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:24,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724244067] [2019-11-23 20:42:24,766 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:24,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-11-23 20:42:24,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 20:42:24,879 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:24,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724244067] [2019-11-23 20:42:24,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:24,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:42:24,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949612419] [2019-11-23 20:42:24,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:42:24,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:42:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:24,882 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand 8 states. [2019-11-23 20:42:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:24,965 INFO L93 Difference]: Finished difference Result 250 states and 313 transitions. [2019-11-23 20:42:24,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:42:24,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-11-23 20:42:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,966 INFO L225 Difference]: With dead ends: 250 [2019-11-23 20:42:24,967 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:42:24,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:42:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2019-11-23 20:42:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:42:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2019-11-23 20:42:24,985 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 50 [2019-11-23 20:42:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,985 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2019-11-23 20:42:24,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:42:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2019-11-23 20:42:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:42:24,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,987 INFO L410 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:25,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,191 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2101917321, now seen corresponding path program 8 times [2019-11-23 20:42:25,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:25,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859695730] [2019-11-23 20:42:25,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:25,198 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:25,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362404477] [2019-11-23 20:42:25,199 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:25,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:25,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:42:25,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 152 proven. 15 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-11-23 20:42:25,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859695730] [2019-11-23 20:42:25,360 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:25,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362404477] [2019-11-23 20:42:25,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:25,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:25,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888419124] [2019-11-23 20:42:25,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:25,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:25,364 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 9 states. [2019-11-23 20:42:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:25,448 INFO L93 Difference]: Finished difference Result 281 states and 349 transitions. [2019-11-23 20:42:25,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:42:25,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2019-11-23 20:42:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:25,451 INFO L225 Difference]: With dead ends: 281 [2019-11-23 20:42:25,451 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:42:25,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:42:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2019-11-23 20:42:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:42:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2019-11-23 20:42:25,484 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 55 [2019-11-23 20:42:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:25,485 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2019-11-23 20:42:25,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2019-11-23 20:42:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:42:25,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:25,491 INFO L410 BasicCegarLoop]: trace histogram [30, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:25,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,695 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1200015844, now seen corresponding path program 9 times [2019-11-23 20:42:25,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:25,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720863123] [2019-11-23 20:42:25,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:25,701 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:25,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37769865] [2019-11-23 20:42:25,701 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:42:25,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:25,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:42:25,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 209 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:42:26,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720863123] [2019-11-23 20:42:26,036 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:26,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37769865] [2019-11-23 20:42:26,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:26,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:42:26,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745910980] [2019-11-23 20:42:26,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:42:26,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:42:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:26,038 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand 10 states. [2019-11-23 20:42:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:26,169 INFO L93 Difference]: Finished difference Result 312 states and 385 transitions. [2019-11-23 20:42:26,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:42:26,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-11-23 20:42:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:26,170 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:42:26,170 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:42:26,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:42:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 158. [2019-11-23 20:42:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:42:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2019-11-23 20:42:26,185 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 60 [2019-11-23 20:42:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:26,185 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2019-11-23 20:42:26,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:42:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2019-11-23 20:42:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:42:26,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:26,186 INFO L410 BasicCegarLoop]: trace histogram [35, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:26,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,398 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1168719895, now seen corresponding path program 10 times [2019-11-23 20:42:26,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:26,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175303046] [2019-11-23 20:42:26,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:26,405 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:26,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887737723] [2019-11-23 20:42:26,406 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,459 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:26,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:26,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:42:26,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 425 proven. 208 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-23 20:42:26,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175303046] [2019-11-23 20:42:26,616 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:26,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887737723] [2019-11-23 20:42:26,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:26,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:42:26,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716095622] [2019-11-23 20:42:26,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:42:26,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:42:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:42:26,618 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand 14 states. [2019-11-23 20:42:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:26,879 INFO L93 Difference]: Finished difference Result 377 states and 457 transitions. [2019-11-23 20:42:26,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:42:26,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-11-23 20:42:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:26,881 INFO L225 Difference]: With dead ends: 377 [2019-11-23 20:42:26,881 INFO L226 Difference]: Without dead ends: 253 [2019-11-23 20:42:26,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:42:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-11-23 20:42:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2019-11-23 20:42:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 20:42:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2019-11-23 20:42:26,900 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 65 [2019-11-23 20:42:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:26,900 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2019-11-23 20:42:26,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:42:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2019-11-23 20:42:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:42:26,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:26,901 INFO L410 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:27,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:27,105 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2019-11-23 20:42:27,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:27,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653463] [2019-11-23 20:42:27,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:27,111 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:27,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87161397] [2019-11-23 20:42:27,112 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true