/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/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:31,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:31,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:31,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:31,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:31,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:31,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:31,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:31,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:31,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:31,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:31,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:31,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:31,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:31,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:31,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:31,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:31,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:31,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:31,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:31,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:31,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:31,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:31,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:31,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:31,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:31,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:31,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:31,781 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 20:40:31,794 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:31,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:31,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:31,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:31,796 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:31,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:31,797 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:31,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:31,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:31,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:31,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:31,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:31,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:31,798 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:31,798 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:31,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:31,799 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:31,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:31,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:31,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:31,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:31,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:31,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:31,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:31,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:31,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:31,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:31,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:31,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:31,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:32,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:32,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:32,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:32,097 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:32,098 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:32,099 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-23 20:40:32,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aac508/27086650c80a4e91ae2094822ad4477e/FLAGb55f9c12a [2019-11-23 20:40:32,652 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:32,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-23 20:40:32,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aac508/27086650c80a4e91ae2094822ad4477e/FLAGb55f9c12a [2019-11-23 20:40:33,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124aac508/27086650c80a4e91ae2094822ad4477e [2019-11-23 20:40:33,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:33,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:33,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:33,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:33,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:33,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,048 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 08:40:33, skipping insertion in model container [2019-11-23 20:40:33,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:33,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:33,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:33,264 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:33,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:33,401 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:33,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33 WrapperNode [2019-11-23 20:40:33,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:33,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:33,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:33,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:33,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:33,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:33,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:33,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:33,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (1/1) ... [2019-11-23 20:40:33,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:33,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:33,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:33,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:33,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (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 20:40:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:33,874 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:33,874 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 20:40:33,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:33 BoogieIcfgContainer [2019-11-23 20:40:33,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:33,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:33,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:33,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:33,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:33" (1/3) ... [2019-11-23 20:40:33,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1364a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:33, skipping insertion in model container [2019-11-23 20:40:33,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:33" (2/3) ... [2019-11-23 20:40:33,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1364a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:33, skipping insertion in model container [2019-11-23 20:40:33,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:33" (3/3) ... [2019-11-23 20:40:33,887 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-11-23 20:40:33,899 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:33,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:33,929 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:33,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:33,968 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:33,968 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:33,968 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:33,968 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:33,968 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:33,969 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:33,969 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-23 20:40:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:40:33,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:33,990 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:33,990 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:33,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1352657881, now seen corresponding path program 1 times [2019-11-23 20:40:34,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:34,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294110123] [2019-11-23 20:40:34,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:34,083 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:34,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493788712] [2019-11-23 20:40:34,084 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 20:40:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:34,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:34,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:34,198 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 20:40:34,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294110123] [2019-11-23 20:40:34,199 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:34,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493788712] [2019-11-23 20:40:34,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:34,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240592505] [2019-11-23 20:40:34,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:34,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:34,218 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-23 20:40:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:34,322 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2019-11-23 20:40:34,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:34,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:40:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:34,341 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:40:34,341 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:40:34,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 20:40:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:40:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-23 20:40:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:40:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-11-23 20:40:34,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2019-11-23 20:40:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:34,408 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-11-23 20:40:34,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-11-23 20:40:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:40:34,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:34,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:34,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:34,624 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash -68107374, now seen corresponding path program 1 times [2019-11-23 20:40:34,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:34,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415058799] [2019-11-23 20:40:34,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:34,640 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:34,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779064313] [2019-11-23 20:40:34,640 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 20:40:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:34,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:34,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:34,717 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 20:40:34,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415058799] [2019-11-23 20:40:34,718 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:34,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779064313] [2019-11-23 20:40:34,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:34,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:34,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143512915] [2019-11-23 20:40:34,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:34,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:34,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:34,721 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2019-11-23 20:40:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:34,795 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2019-11-23 20:40:34,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:34,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:40:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:34,798 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:40:34,798 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:40:34,799 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 20:40:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:40:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-23 20:40:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:40:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:40:34,807 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2019-11-23 20:40:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:34,807 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:40:34,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:40:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:40:34,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:34,809 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:35,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1915152726, now seen corresponding path program 1 times [2019-11-23 20:40:35,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:35,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071950965] [2019-11-23 20:40:35,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:35,034 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:35,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213228669] [2019-11-23 20:40:35,035 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 20:40:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:35,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:35,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:35,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071950965] [2019-11-23 20:40:35,149 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:35,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213228669] [2019-11-23 20:40:35,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:35,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:35,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594012441] [2019-11-23 20:40:35,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:35,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:35,152 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-23 20:40:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:35,280 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2019-11-23 20:40:35,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:35,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:40:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:35,281 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:40:35,282 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:40:35,283 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 20:40:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:40:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-23 20:40:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:40:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-23 20:40:35,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2019-11-23 20:40:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:35,306 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-23 20:40:35,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-23 20:40:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:40:35,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:35,308 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:35,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,515 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1028293614, now seen corresponding path program 2 times [2019-11-23 20:40:35,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:35,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931310351] [2019-11-23 20:40:35,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:35,521 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:35,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957183885] [2019-11-23 20:40:35,522 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:35,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:35,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:35,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:40:35,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931310351] [2019-11-23 20:40:35,588 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:35,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957183885] [2019-11-23 20:40:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:35,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:35,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7733480] [2019-11-23 20:40:35,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:35,591 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-11-23 20:40:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:35,682 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2019-11-23 20:40:35,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:35,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:40:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:35,684 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:40:35,684 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:40:35,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 20:40:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:40:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2019-11-23 20:40:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:40:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-11-23 20:40:35,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2019-11-23 20:40:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:35,703 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-11-23 20:40:35,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-11-23 20:40:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:40:35,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:35,706 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:35,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 883368454, now seen corresponding path program 1 times [2019-11-23 20:40:35,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:35,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347521550] [2019-11-23 20:40:35,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:35,916 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:35,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265787593] [2019-11-23 20:40:35,917 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 20:40:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:35,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:35,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:40:36,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347521550] [2019-11-23 20:40:36,013 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:36,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265787593] [2019-11-23 20:40:36,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:36,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:40:36,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938985305] [2019-11-23 20:40:36,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:40:36,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:36,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:40:36,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:36,016 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 6 states. [2019-11-23 20:40:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:36,111 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2019-11-23 20:40:36,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:40:36,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:40:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:36,112 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:40:36,113 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:40:36,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 20:40:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:40:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-11-23 20:40:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:40:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-11-23 20:40:36,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 27 [2019-11-23 20:40:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:36,122 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-11-23 20:40:36,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:40:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-11-23 20:40:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:40:36,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:36,124 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:36,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:36,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -202296780, now seen corresponding path program 2 times [2019-11-23 20:40:36,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:36,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409012482] [2019-11-23 20:40:36,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:36,342 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:36,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015973853] [2019-11-23 20:40:36,343 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 20:40:36,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:36,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:36,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:36,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:40:36,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409012482] [2019-11-23 20:40:36,452 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:36,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015973853] [2019-11-23 20:40:36,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:36,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:36,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993310729] [2019-11-23 20:40:36,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:36,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:36,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:36,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:36,454 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 7 states. [2019-11-23 20:40:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:36,562 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2019-11-23 20:40:36,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:40:36,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-23 20:40:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:36,564 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:40:36,564 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:40:36,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 20:40:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:40:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2019-11-23 20:40:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:40:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-23 20:40:36,574 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-11-23 20:40:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:36,574 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-23 20:40:36,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-23 20:40:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:40:36,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:36,576 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:36,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:36,788 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1717790278, now seen corresponding path program 3 times [2019-11-23 20:40:36,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:36,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061125058] [2019-11-23 20:40:36,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:36,795 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:36,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428210489] [2019-11-23 20:40:36,795 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 20:40:36,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:36,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:36,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:36,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:40:36,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061125058] [2019-11-23 20:40:36,866 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:36,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428210489] [2019-11-23 20:40:36,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:36,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:36,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221078297] [2019-11-23 20:40:36,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:36,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:36,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:36,872 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 5 states. [2019-11-23 20:40:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:36,973 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2019-11-23 20:40:36,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:36,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-23 20:40:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:36,976 INFO L225 Difference]: With dead ends: 155 [2019-11-23 20:40:36,976 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:40:36,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 20:40:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:40:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2019-11-23 20:40:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:40:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2019-11-23 20:40:36,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 33 [2019-11-23 20:40:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:36,993 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2019-11-23 20:40:36,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2019-11-23 20:40:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:40:36,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:36,995 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:37,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:37,207 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301497, now seen corresponding path program 4 times [2019-11-23 20:40:37,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:37,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517502430] [2019-11-23 20:40:37,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:37,216 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:37,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094614408] [2019-11-23 20:40:37,216 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