/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:40,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:40,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:41,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:41,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:41,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:41,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:41,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:41,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:41,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:41,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:41,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:41,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:41,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:41,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:41,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:41,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:41,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:41,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:41,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:41,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:41,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:41,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:41,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:41,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:41,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:41,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:41,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:41,047 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 [2019-11-07 01:29:41,064 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:41,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:41,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:41,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:41,067 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:41,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:41,068 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:41,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:41,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:41,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:41,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:41,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:41,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:41,069 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:41,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:41,069 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:41,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:41,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:41,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:41,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:41,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:41,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:41,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:41,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:41,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:41,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:41,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:41,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:41,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:29:41,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:41,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:41,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:41,458 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:41,459 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:41,459 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-07 01:29:41,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d91fb3a/62b4a923d0b94c6d9efbd7e3dace0488/FLAG7cd62bc7c [2019-11-07 01:29:41,930 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:41,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-07 01:29:41,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d91fb3a/62b4a923d0b94c6d9efbd7e3dace0488/FLAG7cd62bc7c [2019-11-07 01:29:42,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d91fb3a/62b4a923d0b94c6d9efbd7e3dace0488 [2019-11-07 01:29:42,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:42,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:42,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:42,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:42,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:42,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d9ebb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42, skipping insertion in model container [2019-11-07 01:29:42,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,306 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:42,329 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:42,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:42,607 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:42,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:42,808 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:42,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42 WrapperNode [2019-11-07 01:29:42,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:42,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:42,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:42,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:42,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (1/1) ... [2019-11-07 01:29:42,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:42,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:42,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:42,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:42,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (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 [2019-11-07 01:29:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:43,376 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:43,377 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 01:29:43,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:43 BoogieIcfgContainer [2019-11-07 01:29:43,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:43,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:43,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:43,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:43,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:42" (1/3) ... [2019-11-07 01:29:43,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6c6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:43, skipping insertion in model container [2019-11-07 01:29:43,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:42" (2/3) ... [2019-11-07 01:29:43,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6c6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:43, skipping insertion in model container [2019-11-07 01:29:43,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:43" (3/3) ... [2019-11-07 01:29:43,387 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-11-07 01:29:43,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:43,406 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:43,418 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:43,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:43,443 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:43,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:43,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:43,445 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:43,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:43,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:43,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-07 01:29:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:29:43,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:43,471 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:43,473 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash 60049518, now seen corresponding path program 1 times [2019-11-07 01:29:43,485 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:43,485 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99802389] [2019-11-07 01:29:43,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:43,578 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:43,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016363495] [2019-11-07 01:29:43,579 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 [2019-11-07 01:29:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:43,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:43,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:43,712 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:43,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99802389] [2019-11-07 01:29:43,739 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:43,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016363495] [2019-11-07 01:29:43,740 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:43,741 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:43,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834269782] [2019-11-07 01:29:43,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:43,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:43,763 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-11-07 01:29:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:43,871 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2019-11-07 01:29:43,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:43,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:29:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:43,887 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:29:43,888 INFO L226 Difference]: Without dead ends: 24 [2019-11-07 01:29:43,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-07 01:29:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-07 01:29:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:29:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-07 01:29:43,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2019-11-07 01:29:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:43,948 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-07 01:29:43,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-07 01:29:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:29:43,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:43,950 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:44,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:44,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash 793182208, now seen corresponding path program 1 times [2019-11-07 01:29:44,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:44,155 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868168668] [2019-11-07 01:29:44,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:44,192 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:44,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745660421] [2019-11-07 01:29:44,192 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 [2019-11-07 01:29:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:44,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:44,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:44,311 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:44,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868168668] [2019-11-07 01:29:44,340 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:44,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745660421] [2019-11-07 01:29:44,340 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:44,341 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:44,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414232629] [2019-11-07 01:29:44,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:44,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:44,344 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 6 states. [2019-11-07 01:29:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:44,504 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2019-11-07 01:29:44,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:44,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:29:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:44,511 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:29:44,511 INFO L226 Difference]: Without dead ends: 39 [2019-11-07 01:29:44,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-07 01:29:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-07 01:29:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:29:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-07 01:29:44,542 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2019-11-07 01:29:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:44,543 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-07 01:29:44,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-07 01:29:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:29:44,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:44,545 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:44,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:44,754 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1989033728, now seen corresponding path program 1 times [2019-11-07 01:29:44,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:44,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485947313] [2019-11-07 01:29:44,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:44,765 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:44,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530082634] [2019-11-07 01:29:44,769 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 [2019-11-07 01:29:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:44,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:44,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:44,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:44,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485947313] [2019-11-07 01:29:44,929 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:44,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530082634] [2019-11-07 01:29:44,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011023737] [2019-11-07 01:29:44,959 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:44,960 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:44,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:44,974 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:44,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:45,174 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:45,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:45,695 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:45,984 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:29:46,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:46,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:46,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060128395] [2019-11-07 01:29:46,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:46,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:46,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:46,041 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2019-11-07 01:29:46,309 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-11-07 01:29:46,549 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-11-07 01:29:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:46,859 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2019-11-07 01:29:46,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:46,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-07 01:29:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:46,861 INFO L225 Difference]: With dead ends: 64 [2019-11-07 01:29:46,861 INFO L226 Difference]: Without dead ends: 44 [2019-11-07 01:29:46,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-07 01:29:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-11-07 01:29:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-07 01:29:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-07 01:29:46,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 22 [2019-11-07 01:29:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:46,876 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-07 01:29:46,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-07 01:29:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 01:29:46,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:46,878 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:47,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:47,088 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 313530172, now seen corresponding path program 1 times [2019-11-07 01:29:47,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:47,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130978887] [2019-11-07 01:29:47,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:47,100 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:47,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144704024] [2019-11-07 01:29:47,101 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 [2019-11-07 01:29:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:47,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:47,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:29:47,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:29:47,242 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130978887] [2019-11-07 01:29:47,242 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:47,242 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144704024] [2019-11-07 01:29:47,242 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230440845] [2019-11-07 01:29:47,244 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:29:47,244 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:47,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:47,245 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:47,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:47,267 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:47,858 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:48,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-11-07 01:29:48,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:48,073 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:48,396 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:29:51,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:51,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 15] total 24 [2019-11-07 01:29:51,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656831443] [2019-11-07 01:29:51,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:51,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-11-07 01:29:51,164 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 24 states. [2019-11-07 01:29:51,567 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-11-07 01:29:53,708 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-11-07 01:30:07,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:07,990 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2019-11-07 01:30:07,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:30:07,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2019-11-07 01:30:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:07,991 INFO L225 Difference]: With dead ends: 107 [2019-11-07 01:30:07,991 INFO L226 Difference]: Without dead ends: 78 [2019-11-07 01:30:07,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=323, Invalid=1235, Unknown=2, NotChecked=0, Total=1560 [2019-11-07 01:30:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-07 01:30:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-11-07 01:30:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-07 01:30:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-11-07 01:30:08,012 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 30 [2019-11-07 01:30:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:08,012 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-11-07 01:30:08,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:30:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-11-07 01:30:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-07 01:30:08,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:08,014 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:08,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:08,219 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1104473412, now seen corresponding path program 2 times [2019-11-07 01:30:08,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:08,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457757733] [2019-11-07 01:30:08,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:08,231 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:08,231 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326574202] [2019-11-07 01:30:08,231 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 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 [2019-11-07 01:30:08,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:30:08,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:08,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:30:08,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-11-07 01:30:08,324 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-11-07 01:30:08,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457757733] [2019-11-07 01:30:08,356 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:08,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326574202] [2019-11-07 01:30:08,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783618319] [2019-11-07 01:30:08,358 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:30:08,358 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:08,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:08,359 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:08,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:08,387 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:08,768 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:08,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-11-07 01:30:08,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:08,998 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:09,290 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-11-07 01:30:11,614 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:11,614 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 15] total 22 [2019-11-07 01:30:11,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450571888] [2019-11-07 01:30:11,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:30:11,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:30:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2019-11-07 01:30:11,618 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 22 states. [2019-11-07 01:30:11,889 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-11-07 01:30:13,907 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-11-07 01:30:14,215 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-11-07 01:30:14,519 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-11-07 01:30:14,837 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67